Athish Babu created HBASE-28494: ----------------------------------- Summary: "WAL system stuck?" due to deadlock at org.apache.hadoop.hbase.regionserver.MultiVersionConcurrencyControl.complete Key: HBASE-28494 URL: https://issues.apache.org/jira/browse/HBASE-28494 Project: HBase Issue Type: Bug Components: regionserver, wal Affects Versions: 2.5.5 Environment: hbase-2.5.5
hadoop-3.3.6 kerberos authentication enabled. OS: debian 11 Reporter: Athish Babu Attachments: RS_thread_dump.txt Currently we come across a issue in write handler threads of a regionserver during AsyncFSWAL append operation. We could see regionserver's write handler threads is going to WAITING State while acquiring lock for WAL append operation at MultiVersionConcurrencyControl.begin {code:java} "RpcServer.default.FPRWQ.Fifo.write.handler=7,queue=3,port=16020" #133 daemon prio=5 os_prio=0 tid=0x00007f9301fe7800 nid=0x329a02 runnable [0x00007f8a6489a000] java.lang.Thread.State: TIMED_WAITING (parking) at sun.misc.Unsafe.park(Native Method) at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:338) 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:263) at org.apache.hadoop.hbase.regionserver.wal.AbstractFSWAL.lambda$stampSequenceIdAndPublishToRingBuffer$10(AbstractFSWAL.java:1202) at org.apache.hadoop.hbase.regionserver.wal.AbstractFSWAL$$Lambda$631/875615795.run(Unknown Source) at org.apache.hadoop.hbase.regionserver.MultiVersionConcurrencyControl.begin(MultiVersionConcurrencyControl.java:144) - locked <0x00007f8afa4d1a80> (a java.util.LinkedList) at org.apache.hadoop.hbase.regionserver.wal.AbstractFSWAL.stampSequenceIdAndPublishToRingBuffer(AbstractFSWAL.java:1201) at org.apache.hadoop.hbase.regionserver.wal.AsyncFSWAL.append(AsyncFSWAL.java:647) at org.apache.hadoop.hbase.regionserver.wal.AbstractFSWAL.lambda$appendData$14(AbstractFSWAL.java:1255) at org.apache.hadoop.hbase.regionserver.wal.AbstractFSWAL$$Lambda$699/1762709833.call(Unknown Source) at org.apache.hadoop.hbase.trace.TraceUtil.trace(TraceUtil.java:216) at org.apache.hadoop.hbase.regionserver.wal.AbstractFSWAL.appendData(AbstractFSWAL.java:1255) at org.apache.hadoop.hbase.regionserver.HRegion.doWALAppend(HRegion.java:7800) at org.apache.hadoop.hbase.regionserver.HRegion.doMiniBatchMutate(HRegion.java:4522) at org.apache.hadoop.hbase.regionserver.HRegion.batchMutate(HRegion.java:4446) at org.apache.hadoop.hbase.regionserver.HRegion.batchMutate(HRegion.java:4368) at org.apache.hadoop.hbase.regionserver.RSRpcServices.doBatchOp(RSRpcServices.java:1033) at org.apache.hadoop.hbase.regionserver.RSRpcServices.doNonAtomicBatchOp(RSRpcServices.java:951) at org.apache.hadoop.hbase.regionserver.RSRpcServices.doNonAtomicRegionMutation(RSRpcServices.java:916) at org.apache.hadoop.hbase.regionserver.RSRpcServices.multi(RSRpcServices.java:2892) at org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos$ClientService$2.callBlockingMethod(ClientProtos.java:45008) at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:415) at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:124) at org.apache.hadoop.hbase.ipc.RpcHandler.run(RpcHandler.java:102) at org.apache.hadoop.hbase.ipc.RpcHandler.run(RpcHandler.java:82) {code} Other write handler threads are getting BLOCKED state while waiting for above lock to get released. {code:java} "RpcServer.default.FPRWQ.Fifo.write.handler=38,queue=2,port=16020" #164 daemon prio=5 os_prio=0 tid=0x00007f9303147800 nid=0x329a21 waiting for monitor entry [0x00007f8a61586000] java.lang.Thread.State: BLOCKED (on object monitor) at org.apache.hadoop.hbase.regionserver.MultiVersionConcurrencyControl.complete(MultiVersionConcurrencyControl.java:179) - waiting to lock <0x00007f8afa4d1a80> (a java.util.LinkedList) at org.apache.hadoop.hbase.regionserver.HRegion.doWALAppend(HRegion.java:7808) at org.apache.hadoop.hbase.regionserver.HRegion.doMiniBatchMutate(HRegion.java:4522) at org.apache.hadoop.hbase.regionserver.HRegion.batchMutate(HRegion.java:4446) at org.apache.hadoop.hbase.regionserver.HRegion.batchMutate(HRegion.java:4368) at org.apache.hadoop.hbase.regionserver.RSRpcServices.doBatchOp(RSRpcServices.java:1033) at org.apache.hadoop.hbase.regionserver.RSRpcServices.doNonAtomicBatchOp(RSRpcServices.java:951) at org.apache.hadoop.hbase.regionserver.RSRpcServices.doNonAtomicRegionMutation(RSRpcServices.java:916) at org.apache.hadoop.hbase.regionserver.RSRpcServices.multi(RSRpcServices.java:2892) at org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos$ClientService$2.callBlockingMethod(ClientProtos.java:45008) at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:415) at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:124) at org.apache.hadoop.hbase.ipc.RpcHandler.run(RpcHandler.java:102) at org.apache.hadoop.hbase.ipc.RpcHandler.run(RpcHandler.java:82){code} Due to above occurence , WAL system getting stucked and facing callqueueTooBig Exception {code:java} ERROR [MemStoreFlusher.0] o.a.h.h.r.MemStoreFlusher - Cache flush failed for region analytics:RawData,DIO|DISK_USAGE_STATS,1710357005367.55ec1db85903bbf9d2588b6d60b7b66f. org.apache.hadoop.hbase.exceptions.TimeoutIOException: Failed to get sync result after 300000 ms for txid=5472571, WAL system stuck? at org.apache.hadoop.hbase.regionserver.wal.SyncFuture.get(SyncFuture.java:171) ~[hbase-server-2.5.5.jar:2.5.5] at org.apache.hadoop.hbase.regionserver.wal.AbstractFSWAL.blockOnSync(AbstractFSWAL.java:869) ~[hbase-server-2.5.5.jar:2.5.5] at org.apache.hadoop.hbase.regionserver.wal.AsyncFSWAL.doSync(AsyncFSWAL.java:668) ~[hbase-server-2.5.5.jar:2.5.5] at org.apache.hadoop.hbase.regionserver.wal.AbstractFSWAL.lambda$sync$1(AbstractFSWAL.java:590) ~[hbase-server-2.5.5.jar:2.5.5] at org.apache.hadoop.hbase.trace.TraceUtil.trace(TraceUtil.java:187) ~[hbase-common-2.5.5.jar:2.5.5] at org.apache.hadoop.hbase.regionserver.wal.AbstractFSWAL.sync(AbstractFSWAL.java:590) ~[hbase-server-2.5.5.jar:2.5.5] at org.apache.hadoop.hbase.regionserver.wal.AbstractFSWAL.sync(AbstractFSWAL.java:580) ~[hbase-server-2.5.5.jar:2.5.5] at org.apache.hadoop.hbase.regionserver.HRegion.doSyncOfUnflushedWALChanges(HRegion.java:2779) ~[hbase-server-2.5.5.jar:2.5.5] at org.apache.hadoop.hbase.regionserver.HRegion.internalPrepareFlushCache(HRegion.java:2721) ~[hbase-server-2.5.5.jar:2.5.5] at org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:2580) ~[hbase-server-2.5.5.jar:2.5.5] at org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:2554) ~[hbase-server-2.5.5.jar:2.5.5] at org.apache.hadoop.hbase.regionserver.HRegion.flushcache(HRegion.java:2424) ~[hbase-server-2.5.5.jar:2.5.5] at org.apache.hadoop.hbase.regionserver.MemStoreFlusher.flushRegion(MemStoreFlusher.java:603) [hbase-server-2.5.5.jar:2.5.5] at org.apache.hadoop.hbase.regionserver.MemStoreFlusher.flushRegion(MemStoreFlusher.java:572) [hbase-server-2.5.5.jar:2.5.5] at org.apache.hadoop.hbase.regionserver.MemStoreFlusher.access$1000(MemStoreFlusher.java:65) [hbase-server-2.5.5.jar:2.5.5] at org.apache.hadoop.hbase.regionserver.MemStoreFlusher$FlushHandler.run(MemStoreFlusher.java:344) [hbase-server-2.5.5.jar:2.5.5] {code} Issue get fixed in above mentioned regionserver after restarting the process. But after sometime again same issue occurs in other regionserver. -- This message was sent by Atlassian Jira (v8.20.10#820010)