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https://issues.apache.org/jira/browse/HDDS-2169?focusedWorklogId=320632&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-320632
]
ASF GitHub Bot logged work on HDDS-2169:
----------------------------------------
Author: ASF GitHub Bot
Created on: 30/Sep/19 16:32
Start Date: 30/Sep/19 16:32
Worklog Time Spent: 10m
Work Description: bshashikant commented on issue #1517: HDDS-2169
URL: https://github.com/apache/hadoop/pull/1517#issuecomment-536642924
Thanks @szetszwo for working on this. With the patch, while running the
tests in TestDataValidateWithUnsafeByteOperations, the below issue is observed.
`2019-09-30 21:58:02,745 [grpc-default-executor-2] ERROR
segmented.SegmentedRaftLogWorker (SegmentedRaftLogWorker.java:<init>(449)) -
e4ab8454-30fe-420c-a1cf-40d223cb4898@group-D0335C23E8DA-SegmentedRaftLogWorker:
writeStateMachineData failed for index 1, entry=(t:1, i:1),
STATEMACHINELOGENTRY, client-6C45A0D09519, cid=8
java.lang.IndexOutOfBoundsException: End index: 135008824 >= 207
at
org.apache.ratis.thirdparty.com.google.protobuf.ByteString.checkRange(ByteString.java:1233)
at
org.apache.ratis.thirdparty.com.google.protobuf.ByteString$LiteralByteString.substring(ByteString.java:1288)
at
org.apache.hadoop.hdds.ratis.ContainerCommandRequestMessage.toProto(ContainerCommandRequestMessage.java:66)
at
org.apache.hadoop.ozone.container.common.transport.server.ratis.ContainerStateMachine.getContainerCommandRequestProto(ContainerStateMachine.java:375)
at
org.apache.hadoop.ozone.container.common.transport.server.ratis.ContainerStateMachine.writeStateMachineData(ContainerStateMachine.java:494)
at
org.apache.ratis.server.raftlog.segmented.SegmentedRaftLogWorker$WriteLog.<init>(SegmentedRaftLogWorker.java:447)
at
org.apache.ratis.server.raftlog.segmented.SegmentedRaftLogWorker.writeLogEntry(SegmentedRaftLogWorker.java:397)
at
org.apache.ratis.server.raftlog.segmented.SegmentedRaftLog.appendEntryImpl(SegmentedRaftLog.java:411)
at
org.apache.ratis.server.raftlog.RaftLog.lambda$appendEntry$10(RaftLog.java:359)
at
org.apache.ratis.server.raftlog.RaftLogSequentialOps$Runner.runSequentially(RaftLogSequentialOps.java:77)
at org.apache.ratis.server.raftlog.RaftLog.appendEntry(RaftLog.java:359)
at org.apache.ratis.server.raftlog.RaftLog.appendImpl(RaftLog.java:183)
at
org.apache.ratis.server.raftlog.RaftLog.lambda$append$2(RaftLog.java:159)
at
org.apache.ratis.server.raftlog.RaftLogSequentialOps$Runner.runSequentially(RaftLogSequentialOps.java:68)
at org.apache.ratis.server.raftlog.RaftLog.append(RaftLog.java:159)
at
org.apache.ratis.server.impl.ServerState.appendLog(ServerState.java:282)
at
org.apache.ratis.server.impl.RaftServerImpl.appendTransaction(RaftServerImpl.java:505)
at
org.apache.ratis.server.impl.RaftServerImpl.submitClientRequestAsync(RaftServerImpl.java:576)
at
org.apache.ratis.server.impl.RaftServerProxy.lambda$submitClientRequestAsync$7(RaftServerProxy.java:333)
at
org.apache.ratis.server.impl.RaftServerProxy.lambda$null$5(RaftServerProxy.java:328)
at org.apache.ratis.util.JavaUtils.callAsUnchecked(JavaUtils.java:109)
at
org.apache.ratis.server.impl.RaftServerProxy.lambda$submitRequest$6(RaftServerProxy.java:328)
at
java.util.concurrent.CompletableFuture.uniComposeStage(CompletableFuture.java:981)
at
java.util.concurrent.CompletableFuture.thenCompose(CompletableFuture.java:2124)
at
org.apache.ratis.server.impl.RaftServerProxy.submitRequest(RaftServerProxy.java:327)
at
org.apache.ratis.server.impl.RaftServerProxy.submitClientRequestAsync(RaftServerProxy.java:333)
at
org.apache.ratis.grpc.client.GrpcClientProtocolService$RequestStreamObserver.processClientRequest(GrpcClientProtocolService.java:220)
at
org.apache.ratis.grpc.client.GrpcClientProtocolService$OrderedRequestStreamObserver.processClientRequest(GrpcClientProtocolService.java:326)
at
org.apache.ratis.util.SlidingWindow$Server.processRequestsFromHead(SlidingWindow.java:429)
at
org.apache.ratis.util.SlidingWindow$Server.receivedRequest(SlidingWindow.java:421)
at
org.apache.ratis.grpc.client.GrpcClientProtocolService$OrderedRequestStreamObserver.processClientRequest(GrpcClientProtocolService.java:345)
at
org.apache.ratis.grpc.client.GrpcClientProtocolService$RequestStreamObserver.onNext(GrpcClientProtocolService.java:240)
at
org.apache.ratis.grpc.client.GrpcClientProtocolService$RequestStreamObserver.onNext(GrpcClientProtocolService.java:168)
at
org.apache.ratis.thirdparty.io.grpc.stub.ServerCalls$StreamingServerCallHandler$StreamingServerCallListener.onMessage(ServerCalls.java:248)
at
org.apache.ratis.thirdparty.io.grpc.internal.ServerCallImpl$ServerStreamListenerImpl.messagesAvailable(ServerCallImpl.java:263)
at
org.apache.ratis.thirdparty.io.grpc.internal.ServerImpl$JumpToApplicationThreadServerStreamListener$1MessagesAvailable.runInContext(ServerImpl.java:686)
at
org.apache.ratis.thirdparty.io.grpc.internal.ContextRunnable.run(ContextRunnable.java:37)
at
org.apache.ratis.thirdparty.io.grpc.internal.SerializingExecutor.run(SerializingExecutor.java:123)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)`
We need to change to code in ContainerStateMachine to parse the correctly in
writeStateMachineData. Can you please check?
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Issue Time Tracking
-------------------
Worklog Id: (was: 320632)
Time Spent: 1h 20m (was: 1h 10m)
> Avoid buffer copies while submitting client requests in Ratis
> -------------------------------------------------------------
>
> Key: HDDS-2169
> URL: https://issues.apache.org/jira/browse/HDDS-2169
> Project: Hadoop Distributed Data Store
> Issue Type: Improvement
> Reporter: Shashikant Banerjee
> Assignee: Tsz-wo Sze
> Priority: Major
> Labels: pull-request-available
> Attachments: o2169_20190923.patch
>
> Time Spent: 1h 20m
> Remaining Estimate: 0h
>
> Currently, while sending write requests to Ratis from ozone, a protobuf
> object containing data encoded and then resultant protobuf is again
> converted to a byteString which internally does a copy of the buffer embedded
> inside the protobuf again so that it can be submitted over to Ratis client.
> Again, while sending the appendRequest as well while building up the
> appendRequestProto, it might be again copying the data. The idea here is to
> provide client so pass the raw data(stateMachine data) separately to ratis
> client without copying overhead.
>
> {code:java}
> private CompletableFuture<RaftClientReply> sendRequestAsync(
> ContainerCommandRequestProto request) {
> try (Scope scope = GlobalTracer.get()
> .buildSpan("XceiverClientRatis." + request.getCmdType().name())
> .startActive(true)) {
> ContainerCommandRequestProto finalPayload =
> ContainerCommandRequestProto.newBuilder(request)
> .setTraceID(TracingUtil.exportCurrentSpan())
> .build();
> boolean isReadOnlyRequest = HddsUtils.isReadOnly(finalPayload);
> // finalPayload already has the byteString data embedded.
> ByteString byteString = finalPayload.toByteString(); -----> It involves a
> copy again.
> if (LOG.isDebugEnabled()) {
> LOG.debug("sendCommandAsync {} {}", isReadOnlyRequest,
> sanitizeForDebug(finalPayload));
> }
> return isReadOnlyRequest ?
> getClient().sendReadOnlyAsync(() -> byteString) :
> getClient().sendAsync(() -> byteString);
> }
> }
> {code}
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