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https://issues.apache.org/jira/browse/DRILL-4057?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15003443#comment-15003443
]
Jacques Nadeau commented on DRILL-4057:
---------------------------------------
Note, I deleted the attachment file here and moved the workaround to
DRILL-4085. Keeping this open until actual concurrency bug is resolved.
> Sporadic IllegalReferenceCountException in RPC layer causes query to hang
> -------------------------------------------------------------------------
>
> Key: DRILL-4057
> URL: https://issues.apache.org/jira/browse/DRILL-4057
> Project: Apache Drill
> Issue Type: Bug
> Reporter: Sudheesh Katkam
> Priority: Critical
>
> In a 10 node cluster, running TPCH queries one at a time, sporadically there
> is a "IllegalReferenceCountException" in the logs causing a query to hang.
> In one of the logs (node 8):
> {code}
> 2015-11-03 15:11:01,611 ucs-node8.perf.lab [DATA-rpc-event-queue] ERROR
> o.a.drill.exec.rpc.data.DataServer - Failure while handling message.
> io.netty.util.IllegalReferenceCountException: refCnt: 0
> at
> io.netty.buffer.AbstractByteBuf.ensureAccessible(AbstractByteBuf.java:1178)
> ~[netty-buffer-4.0.27.Final.jar:4.0.27.Final]
> at
> io.netty.buffer.AbstractByteBuf.checkReadableBytes(AbstractByteBuf.java:1161)
> ~[netty-buffer-4.0.27.Final.jar:4.0.27.Final]
> at
> io.netty.buffer.AbstractByteBuf.readBytes(AbstractByteBuf.java:676)
> ~[netty-buffer-4.0.27.Final.jar:4.0.27.Final]
> at
> io.netty.buffer.ByteBufInputStream.read(ByteBufInputStream.java:120)
> ~[netty-buffer-4.0.27.Final.jar:4.0.27.Final]
> at java.io.InputStream.read(InputStream.java:101) ~[na:1.7.0_65]
> at
> com.google.protobuf.CodedInputStream.refillBuffer(CodedInputStream.java:737)
> ~[protobuf-java-2.5.0.jar:na]
> at
> com.google.protobuf.CodedInputStream.isAtEnd(CodedInputStream.java:701)
> ~[protobuf-java-2.5.0.jar:na]
> at
> com.google.protobuf.CodedInputStream.readTag(CodedInputStream.java:99)
> ~[protobuf-java-2.5.0.jar:na]
> at
> org.apache.drill.exec.proto.BitData$FragmentRecordBatch.<init>(BitData.java:1152)
> ~[drill-protocol-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT]
> at
> org.apache.drill.exec.proto.BitData$FragmentRecordBatch.<init>(BitData.java:1116)
> ~[drill-protocol-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT]
> at
> org.apache.drill.exec.proto.BitData$FragmentRecordBatch$1.parsePartialFrom(BitData.java:1269)
> ~[drill-protocol-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT]
> at
> org.apache.drill.exec.proto.BitData$FragmentRecordBatch$1.parsePartialFrom(BitData.java:1264)
> ~[drill-protocol-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT]
> at
> com.google.protobuf.AbstractParser.parsePartialFrom(AbstractParser.java:200)
> ~[protobuf-java-2.5.0.jar:na]
> at
> com.google.protobuf.AbstractParser.parseFrom(AbstractParser.java:217)
> ~[protobuf-java-2.5.0.jar:na]
> at
> com.google.protobuf.AbstractParser.parseFrom(AbstractParser.java:223)
> ~[protobuf-java-2.5.0.jar:na]
> at
> com.google.protobuf.AbstractParser.parseFrom(AbstractParser.java:49)
> ~[protobuf-java-2.5.0.jar:na]
> at org.apache.drill.exec.rpc.RpcBus.get(RpcBus.java:332)
> ~[drill-java-exec-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT]
> at
> org.apache.drill.exec.rpc.data.DataServer.handle(DataServer.java:124)
> ~[drill-java-exec-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT]
> at
> org.apache.drill.exec.rpc.data.DataServer.handle(DataServer.java:51)
> ~[drill-java-exec-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT]
> at org.apache.drill.exec.rpc.RpcBus$RequestEvent.run(RpcBus.java:390)
> ~[drill-java-exec-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT]
> at
> org.apache.drill.common.SerializedExecutor$RunnableProcessor.run(SerializedExecutor.java:105)
> [drill-common-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT]
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> [na:1.7.0_65]
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> [na:1.7.0_65]
> at java.lang.Thread.run(Thread.java:745) [na:1.7.0_65]
> ...
> 2015-11-03 15:11:01,612 ucs-node8.perf.lab [DATA-rpc-event-queue] ERROR
> o.a.drill.exec.rpc.data.DataServer - Failure while running rpc command.
> java.lang.IllegalArgumentException: Buffer has negative reference count.
> at
> com.google.common.base.Preconditions.checkArgument(Preconditions.java:92)
> ~[guava-14.0.1.jar:na]
> at io.netty.buffer.DrillBuf.release(DrillBuf.java:250)
> ~[drill-java-exec-1.3.0-SNAPSHOT.jar:4.0.27.Final]
> at io.netty.buffer.DrillBuf.release(DrillBuf.java:259)
> ~[drill-java-exec-1.3.0-SNAPSHOT.jar:4.0.27.Final]
> at io.netty.buffer.DrillBuf.release(DrillBuf.java:239)
> ~[drill-java-exec-1.3.0-SNAPSHOT.jar:4.0.27.Final]
> at org.apache.drill.exec.rpc.RpcBus$RequestEvent.run(RpcBus.java:397)
> ~[drill-java-exec-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT]
> at
> org.apache.drill.common.SerializedExecutor$RunnableProcessor.run(SerializedExecutor.java:105)
> ~[drill-common-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT]
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> [na:1.7.0_65]
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> [na:1.7.0_65]
> at java.lang.Thread.run(Thread.java:745) [na:1.7.0_65]
> {code}
> On one of the other nodes (node 9), there is a thread that is waiting:
> {code}
> "29c6c10e-642f-c605-cd73-f466ddd986d4:frag:1:216" daemon prio=10
> tid=0x00007fc2d151f800 nid=0x5edf waiting on condition [0x00007fc273f36000]
> java.lang.Thread.State: WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for <0x0000000715db0ba8> (a
> java.util.concurrent.Semaphore$NonfairSync)
> at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
> at
> java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:834)
> at
> java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireSharedInterruptibly(AbstractQueuedSynchronizer.java:994)
> at
> java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireSharedInterruptibly(AbstractQueuedSynchronizer.java:1303)
> at java.util.concurrent.Semaphore.acquire(Semaphore.java:472)
> at
> org.apache.drill.exec.ops.SendingAccountor.waitForSendComplete(SendingAccountor.java:48)
> - locked <0x0000000715db0b70> (a
> org.apache.drill.exec.ops.SendingAccountor)
> at
> org.apache.drill.exec.ops.FragmentContext.waitForSendComplete(FragmentContext.java:441)
> at
> org.apache.drill.exec.physical.impl.BaseRootExec.close(BaseRootExec.java:133)
> at
> org.apache.drill.exec.work.fragment.FragmentExecutor.closeOutResources(FragmentExecutor.java:339)
> at
> org.apache.drill.exec.work.fragment.FragmentExecutor.cleanup(FragmentExecutor.java:179)
> at
> org.apache.drill.exec.work.fragment.FragmentExecutor.run(FragmentExecutor.java:290)
> at
> org.apache.drill.common.SelfCleaningRunnable.run(SelfCleaningRunnable.java:38)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> at java.lang.Thread.run(Thread.java:745)
> {code}
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