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https://issues.apache.org/jira/browse/HBASE-16429?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15425636#comment-15425636
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Hadoop QA commented on HBASE-16429:
-----------------------------------
| (/) *{color:green}+1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 0m 14s
{color} | {color:blue} Docker mode activated. {color} |
| {color:green}+1{color} | {color:green} @author {color} | {color:green} 0m 0s
{color} | {color:green} The patch does not contain any @author tags. {color} |
| {color:green}+1{color} | {color:green} test4tests {color} | {color:green} 0m
0s {color} | {color:green} The patch appears to include 1 new or modified test
files. {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 2m
59s {color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 32s
{color} | {color:green} master passed with JDK v1.8.0_101 {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 34s
{color} | {color:green} master passed with JDK v1.7.0_101 {color} |
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49s {color} | {color:green} master passed {color} |
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17s {color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 1m
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| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 25s
{color} | {color:green} master passed with JDK v1.8.0_101 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 34s
{color} | {color:green} master passed with JDK v1.7.0_101 {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 0m
45s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 31s
{color} | {color:green} the patch passed with JDK v1.8.0_101 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 0m 31s
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 35s
{color} | {color:green} the patch passed with JDK v1.7.0_101 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 0m 35s
{color} | {color:green} the patch passed {color} |
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16s {color} | {color:green} the patch passed {color} |
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0s {color} | {color:green} The patch has no whitespace issues. {color} |
| {color:green}+1{color} | {color:green} hadoopcheck {color} | {color:green}
27m 21s {color} | {color:green} Patch does not cause any errors with Hadoop
2.4.0 2.4.1 2.5.0 2.5.1 2.5.2 2.6.1 2.6.2 2.6.3 2.7.1. {color} |
| {color:green}+1{color} | {color:green} hbaseprotoc {color} | {color:green} 0m
15s {color} | {color:green} the patch passed {color} |
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| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 33s
{color} | {color:green} the patch passed with JDK v1.7.0_101 {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 100m 26s
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| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m
19s {color} | {color:green} The patch does not generate ASF License warnings.
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 143m 12s {color}
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|| Subsystem || Report/Notes ||
| Docker | Client=1.11.2 Server=1.11.2 Image:yetus/hbase:date2016-08-17 |
| JIRA Patch URL |
https://issues.apache.org/jira/secure/attachment/12824065/HBASE-16429.patch |
| JIRA Issue | HBASE-16429 |
| Optional Tests | asflicense javac javadoc unit findbugs hadoopcheck
hbaseanti checkstyle compile |
| uname | Linux 2941c1a670b5 3.13.0-92-generic #139-Ubuntu SMP Tue Jun 28
20:42:26 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality |
/home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build/component/dev-support/hbase-personality.sh
|
| git revision | master / e637a61 |
| Default Java | 1.7.0_101 |
| Multi-JDK versions | /usr/lib/jvm/java-8-oracle:1.8.0_101
/usr/lib/jvm/java-7-openjdk-amd64:1.7.0_101 |
| findbugs | v3.0.0 |
| Test Results |
https://builds.apache.org/job/PreCommit-HBASE-Build/3133/testReport/ |
| modules | C: hbase-server U: hbase-server |
| Console output |
https://builds.apache.org/job/PreCommit-HBASE-Build/3133/console |
| Powered by | Apache Yetus 0.3.0 http://yetus.apache.org |
This message was automatically generated.
> FSHLog: deadlock if rollWriter called when ring buffer filled with appends
> --------------------------------------------------------------------------
>
> Key: HBASE-16429
> URL: https://issues.apache.org/jira/browse/HBASE-16429
> Project: HBase
> Issue Type: Bug
> Affects Versions: 1.1.2, 1.2.2
> Reporter: Yu Li
> Assignee: Yu Li
> Priority: Critical
> Attachments: HBASE-16429.patch
>
>
> Recently we experienced an online problem that all handlers are stuck.
> Checking the jstack we could see all handler threads waiting for
> RingBuffer.next, while the single ring buffer consumer dead waiting for
> {{safePointReleasedLatch}} to count down:
> {noformat}
> Normal handler thread:
> "B.defaultRpcServer.handler=126,queue=9,port=16020" daemon prio=10
> tid=0x00007efd4b44f800 nid=0x15f29 runnable [0x00007efd3db7b000]
> java.lang.Thread.State: TIMED_WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> at
> java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:349)
> at
> com.lmax.disruptor.MultiProducerSequencer.next(MultiProducerSequencer.java:136)
> at
> com.lmax.disruptor.MultiProducerSequencer.next(MultiProducerSequencer.java:105)
> at com.lmax.disruptor.RingBuffer.next(RingBuffer.java:246)
> at
> org.apache.hadoop.hbase.regionserver.wal.FSHLog.append(FSHLog.java:1222)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.doMiniBatchMutation(HRegion.java:3188)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.batchMutate(HRegion.java:2879)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.batchMutate(HRegion.java:2819)
> at
> org.apache.hadoop.hbase.regionserver.RSRpcServices.doBatchOp(RSRpcServices.java:736)
> at
> org.apache.hadoop.hbase.regionserver.RSRpcServices.doNonAtomicRegionMutation(RSRpcServices.java:698)
> at
> org.apache.hadoop.hbase.regionserver.RSRpcServices.multi(RSRpcServices.java:2095)
> at
> org.apache.hadoop.hbase.protobuf.generated.ClientProtos$ClientService$2.callBlockingMethod(ClientProtos.java:32213)
> at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:774)
> at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:102)
> at
> org.apache.hadoop.hbase.ipc.RpcExecutor.consumerLoop(RpcExecutor.java:133)
> at org.apache.hadoop.hbase.ipc.RpcExecutor$1.run(RpcExecutor.java:108)
> at java.lang.Thread.run(Thread.java:756)
> RingBufferEventHandler thread waiting for safePointReleasedLatch:
> "regionserver/hadoop0369.et2.tbsite.net/11.251.152.226:16020.append-pool2-t1"
> prio=10 tid=0x00007efd320d0000 nid=0x1777b waiting on condition
> [0x00007efd2d2fa000]
> java.lang.Thread.State: WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for <0x00007f01b48d9178> (a
> java.util.concurrent.CountDownLatch$Sync)
> 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.CountDownLatch.await(CountDownLatch.java:236)
> at
> org.apache.hadoop.hbase.regionserver.wal.FSHLog$SafePointZigZagLatch.safePointAttained(FSHLog.java:1866)
> at
> org.apache.hadoop.hbase.regionserver.wal.FSHLog$RingBufferEventHandler.attainSafePoint(FSHLog.java:2066)
> at
> org.apache.hadoop.hbase.regionserver.wal.FSHLog$RingBufferEventHandler.onEvent(FSHLog.java:2029)
> at
> org.apache.hadoop.hbase.regionserver.wal.FSHLog$RingBufferEventHandler.onEvent(FSHLog.java:1909)
> at
> com.lmax.disruptor.BatchEventProcessor.run(BatchEventProcessor.java:128)
> 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:756)
> {noformat}
> {{FSHLog#replaceWriter}} will call {{SafePointZigZagLatch#releaseSafePoint}}
> to count down {{safePointReleasedLatch}}, but replaceWriter got stuck when
> trying to publish a sync onto ring buffer:
> {noformat}
> "regionserver/hadoop0369.et2.tbsite.net/11.251.152.226:16020.logRoller"
> daemon prio=10 tid=0x00007efd320c8800 nid=0x16123 runnable
> [0x00007efd311f6000]
> java.lang.Thread.State: TIMED_WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> at
> java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:349)
> at
> com.lmax.disruptor.MultiProducerSequencer.next(MultiProducerSequencer.java:136)
> at
> com.lmax.disruptor.MultiProducerSequencer.next(MultiProducerSequencer.java:105)
> at com.lmax.disruptor.RingBuffer.next(RingBuffer.java:246)
> at
> org.apache.hadoop.hbase.regionserver.wal.FSHLog.publishSyncOnRingBuffer(FSHLog.java:1481)
> at
> org.apache.hadoop.hbase.regionserver.wal.FSHLog.publishSyncOnRingBuffer(FSHLog.java:1477)
> at
> org.apache.hadoop.hbase.regionserver.wal.FSHLog.replaceWriter(FSHLog.java:957)
> at
> org.apache.hadoop.hbase.regionserver.wal.FSHLog.rollWriter(FSHLog.java:726)
> at
> org.apache.hadoop.hbase.regionserver.LogRoller.run(LogRoller.java:148)
> at java.lang.Thread.run(Thread.java:756)
> {noformat}
> Thus deadlock happens.
> A brief process of how deadlock forms:
> {noformat}
> ring buffer filled with appends
> -> rollWriter happens
> -> the only consumer of ring buffer waiting for safePointReleasedLatch
> -> rollWriter cannot publish sync since ring buffer is full
> -> rollWriter won't release safePointReleasedLatch
> {noformat}
> This JIRA targeting at resolve this issue, and will add a UT to cover the case
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