Deadlock in regionserver
------------------------
Key: HBASE-864
URL: https://issues.apache.org/jira/browse/HBASE-864
Project: Hadoop HBase
Issue Type: Bug
Reporter: stack
Found in 0.2.0 by Michael Bieniosk:
{code}
Found one Java-level deadlock:============================="IPC Server handler
9 on 60020": waiting to lock monitor 0x00000000405b6688 (object
0x00007f328f64f260, a org.apache.hadoop.hbase.regionserver.HRegion$WriteState),
which is held by "IPC Server handler 3 on 60020""IPC Server handler 3 on
60020": waiting to lock monitor 0x00000000403d05a0 (object 0x00007f328ce1e988,
a java.util.HashSet), which is held by
"regionserver/0:0:0:0:0:0:0:0:60020.cacheFlusher""regionserver/0:0:0:0:0:0:0:0:60020.cacheFlusher":
waiting to lock monitor 0x00000000405b6688 (object 0x00007f328f64f260, a
org.apache.hadoop.hbase.regionserver.HRegion$WriteState),
which is held by "IPC Server handler 3 on 60020"
Java stack information for the threads listed above:
===================================================
"IPC Server handler 9 on 60020":
at
org.apache.hadoop.hbase.regionserver.HRegion.requestFlush(HRegion.java:1623)
- waiting to lock <0x00007f328f64f260> (a
org.apache.hadoop.hbase.regionserver.HRegion$WriteState)
at
org.apache.hadoop.hbase.regionserver.HRegion.update(HRegion.java:1614)
at
org.apache.hadoop.hbase.regionserver.HRegion.batchUpdate(HRegion.java:1398)
at
org.apache.hadoop.hbase.regionserver.HRegionServer.batchUpdate(HRegionServer.java:1151)
at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.hadoop.hbase.ipc.HbaseRPC$Server.call(HbaseRPC.java:473)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:896)
"IPC Server handler 3 on 60020":
at
org.apache.hadoop.hbase.regionserver.Flusher.addRegion(Flusher.java:237)
- waiting to lock <0x00007f328ce1e988> (a java.util.HashSet)
at
org.apache.hadoop.hbase.regionserver.Flusher.request(Flusher.java:114)
at
org.apache.hadoop.hbase.regionserver.HRegion.requestFlush(HRegion.java:1627)
- locked <0x00007f328f64f260> (a
org.apache.hadoop.hbase.regionserver.HRegion$WriteState)
at
org.apache.hadoop.hbase.regionserver.HRegion.update(HRegion.java:1614)
at
org.apache.hadoop.hbase.regionserver.HRegion.batchUpdate(HRegion.java:1398)
at
org.apache.hadoop.hbase.regionserver.HRegionServer.batchUpdate(HRegionServer.java:1151)
at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.hadoop.hbase.ipc.HbaseRPC$Server.call(HbaseRPC.java:473)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:896)
"regionserver/0:0:0:0:0:0:0:0:60020.cacheFlusher":
at
org.apache.hadoop.hbase.regionserver.HRegion.flushcache(HRegion.java:948)
- waiting to lock <0x00007f328f64f260> (a
org.apache.hadoop.hbase.regionserver.HRegion$WriteState)
at
org.apache.hadoop.hbase.regionserver.Flusher.flushRegion(Flusher.java:173)
- locked <0x00007f328ce1e988> (a java.util.HashSet)
at org.apache.hadoop.hbase.regionserver.Flusher.run(Flusher.java:91)
Found 1 deadlock.
{code}
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