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From "Keith Turner (JIRA)" <j...@apache.org>
Subject [jira] [Created] (ACCUMULO-2003) Garbage collector fails to compact metadata table
Date Wed, 11 Dec 2013 16:39:08 GMT
Keith Turner created ACCUMULO-2003:
--------------------------------------

             Summary: Garbage collector fails to compact metadata table
                 Key: ACCUMULO-2003
                 URL: https://issues.apache.org/jira/browse/ACCUMULO-2003
             Project: Accumulo
          Issue Type: Bug
            Reporter: Keith Turner
             Fix For: 1.6.0


While running randomwalk test on 1.6.0-SNAPSHOT I noticed some errors on the monitor page
indicating the Accumulo garbage collector could not compact the metadata table.

The following exception is in the GC log.

{noformat}
2013-12-11 10:49:57,447 [gc.SimpleGarbageCollector] WARN : org.apache.accumulo.core.client.AccumuloException:
Internal error processing waitForTableOperation
org.apache.accumulo.core.client.AccumuloException: Internal error processing waitForTableOperation
        at org.apache.accumulo.core.client.admin.TableOperationsImpl.doTableOperation(TableOperationsImpl.java:330)
        at org.apache.accumulo.core.client.admin.TableOperationsImpl.compact(TableOperationsImpl.java:826)
        at org.apache.accumulo.core.client.admin.TableOperationsImpl.compact(TableOperationsImpl.java:807)
        at org.apache.accumulo.gc.SimpleGarbageCollector.run(SimpleGarbageCollector.java:474)
        at org.apache.accumulo.gc.SimpleGarbageCollector.main(SimpleGarbageCollector.java:144)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.accumulo.start.Main$1.run(Main.java:137)
        at java.lang.Thread.run(Thread.java:662)
Caused by: org.apache.thrift.TApplicationException: Internal error processing waitForTableOperation
        at org.apache.thrift.TApplicationException.read(TApplicationException.java:108)
        at org.apache.thrift.TServiceClient.receiveBase(TServiceClient.java:71)
        at org.apache.accumulo.core.master.thrift.MasterClientService$Client.recv_waitForTableOperation(MasterClientService.java:610)
        at org.apache.accumulo.core.master.thrift.MasterClientService$Client.waitForTableOperation(MasterClientService.java:595)
        at org.apache.accumulo.core.client.admin.TableOperationsImpl.waitForTableOperation(TableOperationsImpl.java:268)
        at org.apache.accumulo.core.client.admin.TableOperationsImpl.doTableOperation(TableOperationsImpl.java:310)
        ... 10 more

{noformat}


I think the following is the cause of the problem from the master logs.  Looking at the code
I suspect this is related to the creation of the root table and that an unnecessary range
operation is being done. 

{noformat}
Failed to execute Repo, tid=0f298c492c30ee6c
	java.lang.IllegalArgumentException: Range [+r<%00; : [] 9223372036854775807 false,+inf)
does not overlap [!0; : [] 9223372036854775807 false,!0<%00; : [] 9223372036854775807 false)
		at org.apache.accumulo.core.data.Range.clip(Range.java:439)
		at org.apache.accumulo.core.data.Range.clip(Range.java:409)
		at org.apache.accumulo.master.tableOps.CompactionDriver.isReady(CompactRange.java:105)
		at org.apache.accumulo.master.tableOps.CompactionDriver.isReady(CompactRange.java:65)
		at org.apache.accumulo.master.tableOps.TraceRepo.isReady(TraceRepo.java:44)
		at org.apache.accumulo.fate.Fate$TransactionRunner.run(Fate.java:64)
		at org.apache.accumulo.fate.util.LoggingRunnable.run(LoggingRunnable.java:34)
		at java.lang.Thread.run(Thread.java:662)
{noformat}



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