mirror of
https://gitee.com/milvus-io/milvus.git
synced 2024-12-09 23:40:06 +08:00
147a3b8bdc
issue: #31222 grpcclient's `call` func return a unrecoverable error, then the caller's retry policy also breaks due to this unrecoverable error. This PR introduce `retry.Handle`, the new func use `func() (bool, error)` as input parameters, which return `shouldRetry` directly, to avoid grpcclient return a unrecoverable error Signed-off-by: Wei Liu <wei.liu@zilliz.com>
609 lines
18 KiB
Go
609 lines
18 KiB
Go
// Licensed to the LF AI & Data foundation under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package grpcclient
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import (
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"context"
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"crypto/tls"
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"strings"
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"sync"
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"time"
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"github.com/cockroachdb/errors"
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grpc_middleware "github.com/grpc-ecosystem/go-grpc-middleware"
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"go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc"
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"go.uber.org/atomic"
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"go.uber.org/zap"
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"google.golang.org/grpc"
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"google.golang.org/grpc/backoff"
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"google.golang.org/grpc/codes"
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"google.golang.org/grpc/credentials"
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"google.golang.org/grpc/credentials/insecure"
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"google.golang.org/grpc/keepalive"
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"github.com/milvus-io/milvus-proto/go-api/v2/commonpb"
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"github.com/milvus-io/milvus-proto/go-api/v2/milvuspb"
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"github.com/milvus-io/milvus/internal/util/sessionutil"
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"github.com/milvus-io/milvus/pkg/log"
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"github.com/milvus-io/milvus/pkg/tracer"
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"github.com/milvus-io/milvus/pkg/util"
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"github.com/milvus-io/milvus/pkg/util/crypto"
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"github.com/milvus-io/milvus/pkg/util/funcutil"
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"github.com/milvus-io/milvus/pkg/util/generic"
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"github.com/milvus-io/milvus/pkg/util/interceptor"
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"github.com/milvus-io/milvus/pkg/util/merr"
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"github.com/milvus-io/milvus/pkg/util/paramtable"
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"github.com/milvus-io/milvus/pkg/util/retry"
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"github.com/milvus-io/milvus/pkg/util/typeutil"
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)
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type GrpcComponent interface {
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GetComponentStates(ctx context.Context, in *milvuspb.GetComponentStatesRequest, opts ...grpc.CallOption) (*milvuspb.ComponentStates, error)
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}
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// clientConnWrapper is the wrapper for client & conn.
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type clientConnWrapper[T GrpcComponent] struct {
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client T
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conn *grpc.ClientConn
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mut sync.RWMutex
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}
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func (c *clientConnWrapper[T]) Pin() {
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c.mut.RLock()
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}
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func (c *clientConnWrapper[T]) Unpin() {
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c.mut.RUnlock()
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}
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func (c *clientConnWrapper[T]) Close() error {
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if c.conn != nil {
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c.mut.Lock()
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defer c.mut.Unlock()
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return c.conn.Close()
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}
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return nil
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}
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// GrpcClient abstracts client of grpc
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type GrpcClient[T GrpcComponent] interface {
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SetRole(string)
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GetRole() string
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SetGetAddrFunc(func() (string, error))
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EnableEncryption()
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SetNewGrpcClientFunc(func(cc *grpc.ClientConn) T)
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ReCall(ctx context.Context, caller func(client T) (any, error)) (any, error)
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Call(ctx context.Context, caller func(client T) (any, error)) (any, error)
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Close() error
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SetNodeID(int64)
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GetNodeID() int64
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SetSession(sess *sessionutil.Session)
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}
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// ClientBase is a base of grpc client
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type ClientBase[T interface {
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GetComponentStates(ctx context.Context, in *milvuspb.GetComponentStatesRequest, opts ...grpc.CallOption) (*milvuspb.ComponentStates, error)
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}] struct {
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getAddrFunc func() (string, error)
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newGrpcClient func(cc *grpc.ClientConn) T
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// grpcClient T
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grpcClient *clientConnWrapper[T]
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encryption bool
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addr atomic.String
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// conn *grpc.ClientConn
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grpcClientMtx sync.RWMutex
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role string
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isNode bool // pre-calculated is node flag
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ClientMaxSendSize int
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ClientMaxRecvSize int
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CompressionEnabled bool
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RetryServiceNameConfig string
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DialTimeout time.Duration
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KeepAliveTime time.Duration
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KeepAliveTimeout time.Duration
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MaxAttempts int
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InitialBackoff float64
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MaxBackoff float64
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// resetInterval is the minimal duration to reset connection
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minResetInterval time.Duration
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lastReset atomic.Time
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// sessionCheckInterval is the minmal duration to check session, preventing too much etcd pulll
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minSessionCheckInterval time.Duration
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lastSessionCheck atomic.Time
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// counter for canceled or deadline exceeded
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ctxCounter atomic.Int32
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maxCancelError int32
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NodeID atomic.Int64
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sess sessionutil.SessionInterface
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}
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func NewClientBase[T interface {
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GetComponentStates(ctx context.Context, in *milvuspb.GetComponentStatesRequest, opts ...grpc.CallOption) (*milvuspb.ComponentStates, error)
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}](config *paramtable.GrpcClientConfig, serviceName string,
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) *ClientBase[T] {
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return &ClientBase[T]{
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ClientMaxRecvSize: config.ClientMaxRecvSize.GetAsInt(),
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ClientMaxSendSize: config.ClientMaxSendSize.GetAsInt(),
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DialTimeout: config.DialTimeout.GetAsDuration(time.Millisecond),
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KeepAliveTime: config.KeepAliveTime.GetAsDuration(time.Millisecond),
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KeepAliveTimeout: config.KeepAliveTimeout.GetAsDuration(time.Millisecond),
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RetryServiceNameConfig: serviceName,
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MaxAttempts: config.MaxAttempts.GetAsInt(),
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InitialBackoff: config.InitialBackoff.GetAsFloat(),
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MaxBackoff: config.MaxBackoff.GetAsFloat(),
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CompressionEnabled: config.CompressionEnabled.GetAsBool(),
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minResetInterval: config.MinResetInterval.GetAsDuration(time.Millisecond),
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minSessionCheckInterval: config.MinSessionCheckInterval.GetAsDuration(time.Millisecond),
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maxCancelError: config.MaxCancelError.GetAsInt32(),
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}
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}
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// SetRole sets role of client
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func (c *ClientBase[T]) SetRole(role string) {
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c.role = role
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if strings.HasPrefix(role, typeutil.DataNodeRole) ||
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strings.HasPrefix(role, typeutil.IndexNodeRole) ||
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strings.HasPrefix(role, typeutil.QueryNodeRole) ||
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strings.HasPrefix(role, typeutil.ProxyRole) {
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c.isNode = true
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}
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}
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// GetRole returns role of client
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func (c *ClientBase[T]) GetRole() string {
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return c.role
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}
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// GetAddr returns address of client
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func (c *ClientBase[T]) GetAddr() string {
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return c.addr.Load()
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}
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// SetGetAddrFunc sets getAddrFunc of client
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func (c *ClientBase[T]) SetGetAddrFunc(f func() (string, error)) {
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c.getAddrFunc = f
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}
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func (c *ClientBase[T]) EnableEncryption() {
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c.encryption = true
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}
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// SetNewGrpcClientFunc sets newGrpcClient of client
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func (c *ClientBase[T]) SetNewGrpcClientFunc(f func(cc *grpc.ClientConn) T) {
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c.newGrpcClient = f
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}
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// GetGrpcClient returns grpc client
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func (c *ClientBase[T]) GetGrpcClient(ctx context.Context) (*clientConnWrapper[T], error) {
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c.grpcClientMtx.RLock()
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if !generic.IsZero(c.grpcClient) {
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defer c.grpcClientMtx.RUnlock()
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return c.grpcClient, nil
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}
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c.grpcClientMtx.RUnlock()
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c.grpcClientMtx.Lock()
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defer c.grpcClientMtx.Unlock()
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if !generic.IsZero(c.grpcClient) {
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return c.grpcClient, nil
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}
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err := c.connect(ctx)
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if err != nil {
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return nil, err
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}
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return c.grpcClient, nil
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}
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func (c *ClientBase[T]) resetConnection(wrapper *clientConnWrapper[T]) {
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if time.Since(c.lastReset.Load()) < c.minResetInterval {
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return
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}
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c.grpcClientMtx.Lock()
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defer c.grpcClientMtx.Unlock()
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if time.Since(c.lastReset.Load()) < c.minResetInterval {
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return
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}
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if generic.IsZero(c.grpcClient) {
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return
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}
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if c.grpcClient != wrapper {
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return
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}
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// wrapper close may block waiting pending request finish
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go func(w *clientConnWrapper[T], addr string) {
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w.Close()
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log.Info("previous client closed", zap.String("role", c.role), zap.String("addr", c.addr.Load()))
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}(c.grpcClient, c.addr.Load())
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c.addr.Store("")
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c.grpcClient = nil
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c.lastReset.Store(time.Now())
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}
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func (c *ClientBase[T]) connect(ctx context.Context) error {
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addr, err := c.getAddrFunc()
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if err != nil {
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log.Ctx(ctx).Warn("failed to get client address", zap.Error(err))
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return err
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}
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opts := tracer.GetInterceptorOpts()
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dialContext, cancel := context.WithTimeout(ctx, c.DialTimeout)
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var conn *grpc.ClientConn
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compress := None
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if c.CompressionEnabled {
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compress = Zstd
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}
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if c.encryption {
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conn, err = grpc.DialContext(
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dialContext,
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addr,
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// #nosec G402
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grpc.WithTransportCredentials(credentials.NewTLS(&tls.Config{})),
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grpc.WithBlock(),
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grpc.WithDefaultCallOptions(
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grpc.MaxCallRecvMsgSize(c.ClientMaxRecvSize),
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grpc.MaxCallSendMsgSize(c.ClientMaxSendSize),
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grpc.UseCompressor(compress),
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),
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grpc.WithUnaryInterceptor(grpc_middleware.ChainUnaryClient(
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otelgrpc.UnaryClientInterceptor(opts...),
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interceptor.ClusterInjectionUnaryClientInterceptor(),
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interceptor.ServerIDInjectionUnaryClientInterceptor(c.GetNodeID()),
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)),
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grpc.WithStreamInterceptor(grpc_middleware.ChainStreamClient(
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otelgrpc.StreamClientInterceptor(opts...),
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interceptor.ClusterInjectionStreamClientInterceptor(),
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interceptor.ServerIDInjectionStreamClientInterceptor(c.GetNodeID()),
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)),
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grpc.WithKeepaliveParams(keepalive.ClientParameters{
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Time: c.KeepAliveTime,
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Timeout: c.KeepAliveTimeout,
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PermitWithoutStream: true,
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}),
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grpc.WithConnectParams(grpc.ConnectParams{
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Backoff: backoff.Config{
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BaseDelay: 100 * time.Millisecond,
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Multiplier: 1.6,
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Jitter: 0.2,
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MaxDelay: 3 * time.Second,
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},
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MinConnectTimeout: c.DialTimeout,
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}),
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grpc.WithPerRPCCredentials(&Token{Value: crypto.Base64Encode(util.MemberCredID)}),
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grpc.FailOnNonTempDialError(true),
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grpc.WithReturnConnectionError(),
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grpc.WithDisableRetry(),
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)
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} else {
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conn, err = grpc.DialContext(
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dialContext,
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addr,
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grpc.WithTransportCredentials(insecure.NewCredentials()),
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grpc.WithBlock(),
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grpc.WithDefaultCallOptions(
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grpc.MaxCallRecvMsgSize(c.ClientMaxRecvSize),
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grpc.MaxCallSendMsgSize(c.ClientMaxSendSize),
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grpc.UseCompressor(compress),
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),
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grpc.WithUnaryInterceptor(grpc_middleware.ChainUnaryClient(
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otelgrpc.UnaryClientInterceptor(opts...),
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interceptor.ClusterInjectionUnaryClientInterceptor(),
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interceptor.ServerIDInjectionUnaryClientInterceptor(c.GetNodeID()),
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)),
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grpc.WithStreamInterceptor(grpc_middleware.ChainStreamClient(
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otelgrpc.StreamClientInterceptor(opts...),
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interceptor.ClusterInjectionStreamClientInterceptor(),
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interceptor.ServerIDInjectionStreamClientInterceptor(c.GetNodeID()),
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)),
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grpc.WithKeepaliveParams(keepalive.ClientParameters{
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Time: c.KeepAliveTime,
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Timeout: c.KeepAliveTimeout,
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PermitWithoutStream: true,
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}),
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grpc.WithConnectParams(grpc.ConnectParams{
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Backoff: backoff.Config{
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BaseDelay: 100 * time.Millisecond,
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Multiplier: 1.6,
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Jitter: 0.2,
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MaxDelay: 3 * time.Second,
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},
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MinConnectTimeout: c.DialTimeout,
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}),
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grpc.WithPerRPCCredentials(&Token{Value: crypto.Base64Encode(util.MemberCredID)}),
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grpc.FailOnNonTempDialError(true),
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grpc.WithReturnConnectionError(),
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grpc.WithDisableRetry(),
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)
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}
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cancel()
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if err != nil {
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return wrapErrConnect(addr, err)
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}
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c.addr.Store(addr)
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c.ctxCounter.Store(0)
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c.grpcClient = &clientConnWrapper[T]{
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client: c.newGrpcClient(conn),
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conn: conn,
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}
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return nil
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}
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func (c *ClientBase[T]) verifySession(ctx context.Context) error {
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if !funcutil.CheckCtxValid(ctx) {
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return nil
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}
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log := log.Ctx(ctx).With(zap.String("clientRole", c.GetRole()))
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if time.Since(c.lastSessionCheck.Load()) < c.minSessionCheckInterval {
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log.Debug("skip session check, verify too frequent")
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return nil
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}
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c.lastSessionCheck.Store(time.Now())
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if c.sess != nil {
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sessions, _, getSessionErr := c.sess.GetSessions(c.GetRole())
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if getSessionErr != nil {
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// Only log but not handle this error as it is an auxiliary logic
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log.Warn("fail to get session", zap.Error(getSessionErr))
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return getSessionErr
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}
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if coordSess, exist := sessions[c.GetRole()]; exist {
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if c.GetNodeID() != coordSess.ServerID {
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log.Warn("server id mismatch, may connected to a old server, start to reset connection",
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zap.Int64("client_node", c.GetNodeID()),
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zap.Int64("current_node", coordSess.ServerID))
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return merr.WrapErrNodeNotMatch(c.GetNodeID(), coordSess.ServerID)
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}
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} else {
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return merr.WrapErrNodeNotFound(c.GetNodeID(), "session not found", c.GetRole())
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}
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}
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return nil
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}
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func (c *ClientBase[T]) needResetCancel() (needReset bool) {
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val := c.ctxCounter.Add(1)
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if val > c.maxCancelError {
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c.ctxCounter.Store(0)
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return true
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}
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return false
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}
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func (c *ClientBase[T]) checkGrpcErr(ctx context.Context, err error) (needRetry, needReset bool, retErr error) {
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log := log.Ctx(ctx).With(zap.String("clientRole", c.GetRole()))
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// Unknown err
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if !funcutil.IsGrpcErr(err) {
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log.Warn("fail to grpc call because of unknown error", zap.Error(err))
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return false, false, err
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}
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// grpc err
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log.Warn("call received grpc error", zap.Error(err))
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switch {
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case funcutil.IsGrpcErr(err, codes.Canceled, codes.DeadlineExceeded):
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// canceled or deadline exceeded
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return true, c.needResetCancel(), err
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case funcutil.IsGrpcErr(err, codes.Unimplemented):
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// for unimplemented error, reset coord connection to avoid old coord's side effect.
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// old coord's side effect: when coord changed, the connection in coord's client won't reset automatically.
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// so if new interface appear in new coord, will got a unimplemented error
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return false, true, merr.WrapErrServiceUnimplemented(err)
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case IsServerIDMismatchErr(err):
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if ok := c.checkNodeSessionExist(ctx); !ok {
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// if session doesn't exist, no need to retry for datanode/indexnode/querynode/proxy
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return false, false, err
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}
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return true, true, err
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case IsCrossClusterRoutingErr(err):
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return true, true, err
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default:
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return true, true, err
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}
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}
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// checkNodeSessionExist checks if the session of the node exists.
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// If the session does not exist , it will return false, otherwise it will return true.
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func (c *ClientBase[T]) checkNodeSessionExist(ctx context.Context) bool {
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if c.isNode {
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err := c.verifySession(ctx)
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if err != nil {
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log.Warn("failed to verify node session", zap.Error(err))
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}
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return !errors.Is(err, merr.ErrNodeNotFound)
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}
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return true
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}
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func (c *ClientBase[T]) call(ctx context.Context, caller func(client T) (any, error)) (any, error) {
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log := log.Ctx(ctx).With(zap.String("client_role", c.GetRole()))
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var (
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ret any
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clientErr error
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wrapper *clientConnWrapper[T]
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)
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wrapper, clientErr = c.GetGrpcClient(ctx)
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if clientErr != nil {
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log.Warn("fail to get grpc client", zap.Error(clientErr))
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}
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resetClientFunc := func() {
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c.resetConnection(wrapper)
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wrapper, clientErr = c.GetGrpcClient(ctx)
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if clientErr != nil {
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log.Warn("fail to get grpc client in the retry state", zap.Error(clientErr))
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}
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}
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ctx, cancel := context.WithCancel(ctx)
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defer cancel()
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err := retry.Handle(ctx, func() (bool, error) {
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if wrapper == nil {
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if ok := c.checkNodeSessionExist(ctx); !ok {
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// if session doesn't exist, no need to reset connection for datanode/indexnode/querynode
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return false, merr.ErrNodeNotFound
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}
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err := errors.Wrap(clientErr, "empty grpc client")
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log.Warn("grpc client is nil, maybe fail to get client in the retry state", zap.Error(err))
|
|
resetClientFunc()
|
|
return true, err
|
|
}
|
|
|
|
wrapper.Pin()
|
|
var err error
|
|
ret, err = caller(wrapper.client)
|
|
wrapper.Unpin()
|
|
|
|
if err != nil {
|
|
var needRetry, needReset bool
|
|
needRetry, needReset, err = c.checkGrpcErr(ctx, err)
|
|
if needReset {
|
|
log.Warn("start to reset connection because of specific reasons", zap.Error(err))
|
|
resetClientFunc()
|
|
} else {
|
|
// err occurs but no need to reset connection, try to verify session
|
|
err := c.verifySession(ctx)
|
|
if err != nil {
|
|
log.Warn("failed to verify session, reset connection", zap.Error(err))
|
|
resetClientFunc()
|
|
}
|
|
}
|
|
return needRetry, err
|
|
}
|
|
// reset counter
|
|
c.ctxCounter.Store(0)
|
|
|
|
var status *commonpb.Status
|
|
switch res := ret.(type) {
|
|
case *commonpb.Status:
|
|
status = res
|
|
case interface{ GetStatus() *commonpb.Status }:
|
|
status = res.GetStatus()
|
|
// streaming call
|
|
case grpc.ClientStream:
|
|
status = merr.Status(nil)
|
|
default:
|
|
// it will directly return the result
|
|
log.Warn("unknown return type", zap.Any("return", ret))
|
|
return false, nil
|
|
}
|
|
|
|
if status == nil {
|
|
log.Warn("status is nil, please fix it", zap.Stack("stack"))
|
|
return false, nil
|
|
}
|
|
|
|
err = merr.Error(status)
|
|
if err != nil && merr.IsRetryableErr(err) {
|
|
return true, err
|
|
}
|
|
return false, nil
|
|
}, retry.Attempts(uint(c.MaxAttempts)),
|
|
// Because the previous InitialBackoff and MaxBackoff were float, and the unit was s.
|
|
// For compatibility, this is multiplied by 1000.
|
|
retry.Sleep(time.Duration(c.InitialBackoff*1000)*time.Millisecond),
|
|
retry.MaxSleepTime(time.Duration(c.MaxBackoff*1000)*time.Millisecond))
|
|
// default value list: MaxAttempts 10, InitialBackoff 0.2s, MaxBackoff 10s
|
|
// and consume 52.8s if all retry failed
|
|
if err != nil {
|
|
// make the error more friendly to user
|
|
if IsCrossClusterRoutingErr(err) {
|
|
err = merr.ErrServiceUnavailable
|
|
}
|
|
|
|
return generic.Zero[T](), err
|
|
}
|
|
|
|
return ret, nil
|
|
}
|
|
|
|
// Call does a grpc call
|
|
func (c *ClientBase[T]) Call(ctx context.Context, caller func(client T) (any, error)) (any, error) {
|
|
if !funcutil.CheckCtxValid(ctx) {
|
|
return generic.Zero[T](), ctx.Err()
|
|
}
|
|
|
|
ret, err := c.call(ctx, caller)
|
|
if err != nil {
|
|
traceErr := errors.Wrapf(err, "stack trace: %s", tracer.StackTrace())
|
|
log.Ctx(ctx).Warn("ClientBase Call grpc call get error",
|
|
zap.String("role", c.GetRole()),
|
|
zap.String("address", c.GetAddr()),
|
|
zap.Error(traceErr),
|
|
)
|
|
return generic.Zero[T](), traceErr
|
|
}
|
|
return ret, err
|
|
}
|
|
|
|
// ReCall does the grpc call twice
|
|
func (c *ClientBase[T]) ReCall(ctx context.Context, caller func(client T) (any, error)) (any, error) {
|
|
// All retry operations are done in `call` function.
|
|
return c.Call(ctx, caller)
|
|
}
|
|
|
|
// Close close the client connection
|
|
func (c *ClientBase[T]) Close() error {
|
|
c.grpcClientMtx.Lock()
|
|
defer c.grpcClientMtx.Unlock()
|
|
if c.grpcClient != nil {
|
|
return c.grpcClient.Close()
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// SetNodeID set ID role of client
|
|
func (c *ClientBase[T]) SetNodeID(nodeID int64) {
|
|
c.NodeID.Store(nodeID)
|
|
}
|
|
|
|
// GetNodeID returns ID of client
|
|
func (c *ClientBase[T]) GetNodeID() int64 {
|
|
return c.NodeID.Load()
|
|
}
|
|
|
|
// SetSession set session role of client
|
|
func (c *ClientBase[T]) SetSession(sess *sessionutil.Session) {
|
|
c.sess = sess
|
|
}
|
|
|
|
func IsCrossClusterRoutingErr(err error) bool {
|
|
// GRPC utilizes `status.Status` to encapsulate errors,
|
|
// hence it is not viable to employ the `errors.Is` for assessment.
|
|
return strings.Contains(err.Error(), merr.ErrServiceCrossClusterRouting.Error())
|
|
}
|
|
|
|
func IsServerIDMismatchErr(err error) bool {
|
|
// GRPC utilizes `status.Status` to encapsulate errors,
|
|
// hence it is not viable to employ the `errors.Is` for assessment.
|
|
return strings.Contains(err.Error(), merr.ErrNodeNotMatch.Error())
|
|
}
|