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From "Josh Elser (JIRA)" <j...@apache.org>
Subject [jira] [Created] (ACCUMULO-3346) ActiveScans on monitor page not showing a scan
Date Wed, 19 Nov 2014 20:33:33 GMT
Josh Elser created ACCUMULO-3346:
------------------------------------

             Summary: ActiveScans on monitor page not showing a scan
                 Key: ACCUMULO-3346
                 URL: https://issues.apache.org/jira/browse/ACCUMULO-3346
             Project: Accumulo
          Issue Type: Bug
          Components: monitor, tserver
    Affects Versions: 1.6.1
            Reporter: Josh Elser
             Fix For: 1.6.2, 1.7.0


Seeing this in the tserver jstack:

{noformat}
"User: root Start: 1416425236658 Client: 127.0.0.1:49462 Tablet: 250<<" daemon prio=5
tid=0x00007f80c692f800 nid=0xe40b waiting on condition [0x000000011d369000]
   java.lang.Thread.State: TIMED_WAITING (sleeping)
        at java.lang.Thread.sleep(Native Method)
        at org.apache.accumulo.core.util.UtilWaitThread.sleep(UtilWaitThread.java:26)
        at org.apache.accumulo.test.functional.SlowIterator.seek(SlowIterator.java:62)
        at org.apache.accumulo.core.iterators.system.SourceSwitchingIterator.readNext(SourceSwitchingIterator.java:121)
        - locked <0x00000007a66adeb8> (a org.apache.accumulo.core.iterators.system.SourceSwitchingIterator)
        at org.apache.accumulo.core.iterators.system.SourceSwitchingIterator.seek(SourceSwitchingIterator.java:167)
        - locked <0x00000007a66adeb8> (a org.apache.accumulo.core.iterators.system.SourceSwitchingIterator)
        at org.apache.accumulo.tserver.Tablet.nextBatch(Tablet.java:1659)
        at org.apache.accumulo.tserver.Tablet.access$3200(Tablet.java:174)
        at org.apache.accumulo.tserver.Tablet$Scanner.read(Tablet.java:1801)
        - locked <0x00000007a4dc4528> (a org.apache.accumulo.tserver.Tablet$Scanner)
        at org.apache.accumulo.tserver.TabletServer$ThriftClientHandler$NextBatchTask.run(TabletServer.java:1042)
        at org.apache.accumulo.trace.instrument.TraceRunnable.run(TraceRunnable.java:47)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at org.apache.accumulo.trace.instrument.TraceRunnable.run(TraceRunnable.java:47)
        at org.apache.accumulo.core.util.LoggingRunnable.run(LoggingRunnable.java:34)
        at java.lang.Thread.run(Thread.java:745)

   Locked ownable synchronizers:
        - <0x00000007a5d362f0> (a java.util.concurrent.ThreadPoolExecutor$Worker)
{noformat}

It's a bit confusing. I know there is a scan active because the table in question is being
blocked from deletion (due to a purposefully long-running scan with SlowIterator). However,
it appears incorrect that the monitor is reporting no active scans.



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