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Date: Tue, 2 Sep 2008 22:03:44 -0700 (PDT)
From: "sishen (JIRA)" <jira@apache.org>
To: hbase-dev@hadoop.apache.org
Subject: [jira] Commented: (HBASE-863) deadlock in hbase rest
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    [ https://issues.apache.org/jira/browse/HBASE-863?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12627905#action_12627905 ] 

sishen commented on HBASE-863:
------------------------------

Hi, Michael. Possible to give more info?

> deadlock in hbase rest
> ----------------------
>
>                 Key: HBASE-863
>                 URL: https://issues.apache.org/jira/browse/HBASE-863
>             Project: Hadoop HBase
>          Issue Type: Bug
>    Affects Versions: 0.2.0
>         Environment: hadoop-0.17.2
>            Reporter: Michael Bieniosek
>            Priority: Blocker
>
> Whenever I make any request to the rest server, my http call hangs forever.
> In the stacktrace, it looks like hbase waits on a lock it holds:
> "SocketListener0-1" prio=10 tid=0x00007fc88c1e2000 nid=0x4860 in Object.wait() [0x0000000041bdd000..0x0000000041bdea00]
>    java.lang.Thread.State: TIMED_WAITING (on object monitor)
>         at java.lang.Object.wait(Native Method)
>         - waiting on <0x00007fc8ef59d700> (a org.apache.hadoop.ipc.Client$Call)
>         at org.apache.hadoop.ipc.Client.call(Client.java:552)
>         - locked <0x00007fc8ef59d700> (a org.apache.hadoop.ipc.Client$Call)
>         at org.apache.hadoop.hbase.ipc.HbaseRPC$Invoker.invoke(HbaseRPC.java:230)
>         at $Proxy1.getProtocolVersion(Unknown Source)
>         at org.apache.hadoop.hbase.ipc.HbaseRPC.getProxy(HbaseRPC.java:340)
>         at org.apache.hadoop.hbase.ipc.HbaseRPC.getProxy(HbaseRPC.java:327)
>         at org.apache.hadoop.hbase.ipc.HbaseRPC.getProxy(HbaseRPC.java:364)
>         at org.apache.hadoop.hbase.ipc.HbaseRPC.waitForProxy(HbaseRPC.java:302)
>         at org.apache.hadoop.hbase.client.HConnectionManager$TableServers.getHRegionConnection(HConnectionManager.java:771)
>         - locked <0x00007fc8ef067618> (a java.util.concurrent.ConcurrentHashMap)
>         at org.apache.hadoop.hbase.client.HConnectionManager$TableServers.locateRegionInMeta(HConnectionManager.java:518)
>         at org.apache.hadoop.hbase.client.HConnectionManager$TableServers.locateRegion(HConnectionManager.java:478)
>         - locked <0x00007fc8ef067600> (a java.lang.Integer)
>         at org.apache.hadoop.hbase.client.HConnectionManager$TableServers.locateRegion(HConnectionManager.java:438)
>         at org.apache.hadoop.hbase.client.HTable.<init>(HTable.java:127)
>         at org.apache.hadoop.hbase.rest.GenericHandler.getTable(GenericHandler.java:260)
>         at org.apache.hadoop.hbase.rest.TableHandler.doGet(TableHandler.java:74)
>         at org.apache.hadoop.hbase.rest.Dispatcher.doGet(Dispatcher.java:105)
>         at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
>         at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
>         at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:427)
>         at org.mortbay.jetty.servlet.WebApplicationHandler.dispatch(WebApplicationHandler.java:475)
>         at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:567)
>         at org.mortbay.http.HttpContext.handle(HttpContext.java:1565)
>         at org.mortbay.jetty.servlet.WebApplicationContext.handle(WebApplicationContext.java:635)
>         at org.mortbay.http.HttpContext.handle(HttpContext.java:1517)
>         at org.mortbay.http.HttpServer.service(HttpServer.java:954)
>         at org.mortbay.http.HttpConnection.service(HttpConnection.java:814)
>         at org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:981)
>         at org.mortbay.http.HttpConnection.handle(HttpConnection.java:831)
>         at org.mortbay.http.SocketListener.handleConnection(SocketListener.java:244)
>         at org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:357)
>         at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:534)

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