[HBASE-14178] regionserver blocks because of waiting for offsetLock

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.98.6
• Fix Version/s: 0.98.14, 1.0.2, 1.2.0, 1.1.2, 2.0.0
• Component/s: regionserver
• Hadoop Flags: Reviewed
• Assignee: Heng Chen
• Reporter: Heng Chen
• Created: 02/Aug/15 07:51
• Updated: 29/May/17 09:32
• Resolved: 06/Aug/15 09:22

Description

My regionserver blocks, and all client rpc timeout.

I print the regionserver's jstack, it seems a lot of threads were blocked for waiting offsetLock, detail infomation belows:

PS: my table's block cache is off

"B.DefaultRpcServer.handler=2,queue=2,port=60020" #82 daemon prio=5 os_prio=0 tid=0x0000000001827000 nid=0x2cdc in Object.wait() [0x00007f3831b72000]
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        at java.lang.Object.wait(Object.java:502)
        at org.apache.hadoop.hbase.util.IdLock.getLockEntry(IdLock.java:79)
        - locked <0x0000000773af7c18> (a org.apache.hadoop.hbase.util.IdLock$Entry)
        at org.apache.hadoop.hbase.io.hfile.HFileReaderV2.readBlock(HFileReaderV2.java:352)
        at org.apache.hadoop.hbase.io.hfile.HFileBlockIndex$BlockIndexReader.loadDataBlockWithScanInfo(HFileBlockIndex.java:253)
        at org.apache.hadoop.hbase.io.hfile.HFileReaderV2$AbstractScannerV2.seekTo(HFileReaderV2.java:524)
        at org.apache.hadoop.hbase.io.hfile.HFileReaderV2$AbstractScannerV2.reseekTo(HFileReaderV2.java:572)
        at org.apache.hadoop.hbase.regionserver.StoreFileScanner.reseekAtOrAfter(StoreFileScanner.java:257)
        at org.apache.hadoop.hbase.regionserver.StoreFileScanner.reseek(StoreFileScanner.java:173)
        at org.apache.hadoop.hbase.regionserver.NonLazyKeyValueScanner.doRealSeek(NonLazyKeyValueScanner.java:55)
        at org.apache.hadoop.hbase.regionserver.KeyValueHeap.generalizedSeek(KeyValueHeap.java:313)
        at org.apache.hadoop.hbase.regionserver.KeyValueHeap.requestSeek(KeyValueHeap.java:269)
        at org.apache.hadoop.hbase.regionserver.StoreScanner.reseek(StoreScanner.java:695)
        at org.apache.hadoop.hbase.regionserver.StoreScanner.seekAsDirection(StoreScanner.java:683)
        at org.apache.hadoop.hbase.regionserver.StoreScanner.next(StoreScanner.java:533)
        at org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java:140)
        at org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.populateResult(HRegion.java:3889)
        at org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.nextInternal(HRegion.java:3969)
        at org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.nextRaw(HRegion.java:3847)
        at org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.next(HRegion.java:3820)
        - locked <0x00000005e5c55ad0> (a org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl)
        at org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.next(HRegion.java:3807)
        at org.apache.hadoop.hbase.regionserver.HRegion.get(HRegion.java:4779)
        at org.apache.hadoop.hbase.regionserver.HRegion.get(HRegion.java:4753)
        at org.apache.hadoop.hbase.regionserver.HRegionServer.get(HRegionServer.java:2916)
        at org.apache.hadoop.hbase.protobuf.generated.ClientProtos$ClientService$2.callBlockingMethod(ClientProtos.java:29583)
        at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:2027)
        at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:108)
        at org.apache.hadoop.hbase.ipc.RpcExecutor.consumerLoop(RpcExecutor.java:114)
        at org.apache.hadoop.hbase.ipc.RpcExecutor$1.run(RpcExecutor.java:94)
        at java.lang.Thread.run(Thread.java:745)

   Locked ownable synchronizers:
        - <0x00000005e5c55c08> (a java.util.concurrent.locks.ReentrantLock$NonfairSync)