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Posted to notifications@accumulo.apache.org by "Eric Newton (JIRA)" <ji...@apache.org> on 2012/11/19 18:35:58 UTC
[jira] [Created] (ACCUMULO-862) master slow start
Eric Newton created ACCUMULO-862:
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Summary: master slow start
Key: ACCUMULO-862
URL: https://issues.apache.org/jira/browse/ACCUMULO-862
Project: Accumulo
Issue Type: Bug
Components: master
Affects Versions: 1.4.1, 1.4.2
Environment: very large cluster
Reporter: Eric Newton
Assignee: Eric Newton
Priority: Minor
Fix For: 1.5.0
Master start-up was delayed by many minutes because it discovered only 3 loggers per second. When jstack'ed, it was stuck here:
{noformat}
"master" prio=10 tid=0x00007ffff086a800 nid=0xa331 in Object.wait() [0x00007fffc565c000]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0x00000000bdd5f940> (a org.apache.zookeeper.ClientCnxn$Packet)
at java.lang.Object.wait(Object.java:485)
at org.apache.zookeeper.ClientCnxn.submitRequest(ClientCnxn.java:1345)
- locked <0x00000000bdd5f940> (a org.apache.zookeeper.ClientCnxn$Packet)
at org.apache.zookeeper.ZooKeeper.getChildren(ZooKeeper.java:1247)
at org.apache.zookeeper.ZooKeeper.getChildren(ZooKeeper.java:1277)
at org.apache.accumulo.core.zookeeper.ZooUtil.recursiveDelete(ZooUtil.java:104)
at org.apache.accumulo.core.zookeeper.ZooUtil.recursiveDelete(ZooUtil.java:118)
at org.apache.accumulo.server.zookeeper.ZooReaderWriter.recursiveDelete(ZooReaderWriter.java:67)
at org.apache.accumulo.server.master.state.DeadServerList.delete(DeadServerList.java:66)
at org.apache.accumulo.server.master.Master.newLogger(Master.java:2198)
at org.apache.accumulo.server.master.TabletServerLoggers.scanZooKeeperForUpdates(TabletServerLoggers.java:93)
- locked <0x00000000c2157b68> (a org.apache.accumulo.server.master.TabletServerLoggers)
at org.apache.accumulo.server.master.Master.run(Master.java:2076)
at org.apache.accumulo.server.master.Master.main(Master.java:2178)
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:89)
at java.lang.Thread.run(Thread.java:662)
{noformat}
Due to many stops/start of loggers, it's possible that there were "dead logger" entries that needed to be deleted. Future starts were not slow.
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