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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-10897) On master start, deadlock if refresh UI
Date Wed, 02 Apr 2014 04:30:18 GMT
stack created HBASE-10897:
-----------------------------

             Summary: On master start, deadlock if refresh UI
                 Key: HBASE-10897
                 URL: https://issues.apache.org/jira/browse/HBASE-10897
             Project: HBase
          Issue Type: Bug
            Reporter: stack


Playing w/ MTTR recovery on trunk, master starting up deadlocked:

Waiting to finish active master initialization:

{code}
"ActiveMasterManager" daemon prio=10 tid=0x00007fafb5dc3800 nid=0x5fb5 waiting for monitor
entry [0x00007faf8f57d000]
   java.lang.Thread.State: BLOCKED (on object monitor)
        at org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation.getKeepAliveZooKeeperWatcher(ConnectionManager.java:1683)
        - waiting to lock <0x000000064ab4b9a8> (a java.lang.Object)
        at org.apache.hadoop.hbase.client.ZooKeeperRegistry.getMetaRegionLocation(ZooKeeperRegistry.java:53)
        at org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation.locateRegion(ConnectionManager.java:1029)
        at org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation.locateRegion(ConnectionManager.java:989)
        at org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation.getRegionLocation(ConnectionManager.java:830)
        at org.apache.hadoop.hbase.client.ConnectionAdapter.getRegionLocation(ConnectionAdapter.java:305)
        at org.apache.hadoop.hbase.client.RegionServerCallable.prepare(RegionServerCallable.java:77)
        at org.apache.hadoop.hbase.client.ScannerCallable.prepare(ScannerCallable.java:118)
        at org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithRetries(RpcRetryingCaller.java:101)
        at org.apache.hadoop.hbase.client.ClientScanner.nextScanner(ClientScanner.java:264)
        at org.apache.hadoop.hbase.client.ClientScanner.initializeScannerInConstruction(ClientScanner.java:169)
        at org.apache.hadoop.hbase.client.ClientScanner.<init>(ClientScanner.java:164)
        at org.apache.hadoop.hbase.client.ClientScanner.<init>(ClientScanner.java:107)
        at org.apache.hadoop.hbase.client.HTable.getScanner(HTable.java:766)
        at org.apache.hadoop.hbase.catalog.MetaReader.fullScan(MetaReader.java:539)
        at org.apache.hadoop.hbase.catalog.MetaReader.fullScanOfMeta(MetaReader.java:140)
        at org.apache.hadoop.hbase.catalog.MetaMigrationConvertingToPB.isMetaTableUpdated(MetaMigrationConvertingToPB.java:164)
        at org.apache.hadoop.hbase.catalog.MetaMigrationConvertingToPB.updateMetaIfNecessary(MetaMigrationConvertingToPB.java:131)
        at org.apache.hadoop.hbase.master.HMaster.finishActiveMasterInitialization(HMaster.java:567)
        at org.apache.hadoop.hbase.master.HMaster.access$500(HMaster.java:147)
        at org.apache.hadoop.hbase.master.HMaster$1.run(HMaster.java:1242)
        at java.lang.Thread.run(Thread.java:744)

{code}

... but the master servlet has the lock while trying to access master:

{code}
"686004346@qtp-2101021459-0" daemon prio=10 tid=0x00007fafb5d2a800 nid=0x5fb1 waiting on condition
[0x00007faf8f87f000]
   java.lang.Thread.State: TIMED_WAITING (sleeping)
        at java.lang.Thread.sleep(Native Method)
        at org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation$StubMaker.makeStub(ConnectionManager.java:1562)
        - locked <0x000000064ab4b9a8> (a java.lang.Object)
        at org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation$MasterServiceStubMaker.makeStub(ConnectionManager.java:1597)
        at org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation.getKeepAliveMasterService(ConnectionManager.java:1805)
        - locked <0x000000064ab4b9a8> (a java.lang.Object)
        at org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation.listTables(ConnectionManager.java:2481)
        at org.apache.hadoop.hbase.client.HBaseAdmin.listTables(HBaseAdmin.java:321)
        at org.apache.hadoop.hbase.tmpl.master.MasterStatusTmplImpl.__jamon_innerUnit__userTables(MasterStatusTmplImpl.java:530)
        at org.apache.hadoop.hbase.tmpl.master.MasterStatusTmplImpl.renderNoFlush(MasterStatusTmplImpl.java:255)
        at org.apache.hadoop.hbase.tmpl.master.MasterStatusTmpl.renderNoFlush(MasterStatusTmpl.java:382)
        at org.apache.hadoop.hbase.tmpl.master.MasterStatusTmpl.render(MasterStatusTmpl.java:372)
        at org.apache.hadoop.hbase.master.MasterStatusServlet.doGet(MasterStatusServlet.java:102)
...
{code}



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