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Date: Thu, 30 Jan 2014 16:18:13 +0000 (UTC)
From: "Jonathan Ellis (JIRA)" <jira@apache.org>
To: commits@cassandra.apache.org
Message-ID: <JIRA.12689086.1389819576045.11031.1391098693986@arcas>
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Subject: [jira] [Commented] (CASSANDRA-6592) IllegalArgumentException when
 Preparing Statements
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    [ https://issues.apache.org/jira/browse/CASSANDRA-6592?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13886721#comment-13886721 ] 

Jonathan Ellis commented on CASSANDRA-6592:
-------------------------------------------

Solved for 1.2.14 by reverting CASSANDRA-6107 (and reducing the statement count from 100k to 50k to try to avoid the original OOM).

> IllegalArgumentException when Preparing Statements
> --------------------------------------------------
>
>                 Key: CASSANDRA-6592
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6592
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>            Reporter: Tyler Hobbs
>            Assignee: Lyuben Todorov
>            Priority: Critical
>             Fix For: 1.2.14, 2.0.5
>
>         Attachments: 0001-Remove-concurrent-use-of-MemoryMeter-instance.txt, 0001-Switch-to-adding-fields-manually-in-measureForPrepared.txt
>
>
> When preparing a lot of statements with the python native driver, I occasionally get an error response with an error that corresponds to the following stacktrace in the cassandra logs:
> {noformat}
> ERROR [Native-Transport-Requests:126] 2014-01-11 13:58:05,503 ErrorMessage.java (line 210) Unexpected exception during request
> java.lang.IllegalArgumentException
>         at com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap.checkArgument(ConcurrentLinkedHashMap.java:259)
>         at com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap$BoundedEntryWeigher.weightOf(ConcurrentLinkedHashMap.java:1448)
>         at com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap.put(ConcurrentLinkedHashMap.java:764)
>         at com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap.put(ConcurrentLinkedHashMap.java:743)
>         at org.apache.cassandra.cql3.QueryProcessor.storePreparedStatement(QueryProcessor.java:255)
>         at org.apache.cassandra.cql3.QueryProcessor.prepare(QueryProcessor.java:221)
>         at org.apache.cassandra.transport.messages.PrepareMessage.execute(PrepareMessage.java:77)
>         at org.apache.cassandra.transport.Message$Dispatcher.messageReceived(Message.java:287)
>         at org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:70)
>         at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
>         at org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)
>         at org.jboss.netty.handler.execution.ChannelUpstreamEventRunnable.doRun(ChannelUpstreamEventRunnable.java:43)
>         at org.jboss.netty.handler.execution.ChannelEventRunnable.run(ChannelEventRunnable.java:67)
>         at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
>         at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
>         at java.lang.Thread.run(Thread.java:662)
> {noformat}
> Looking at the CLHM source, this means we're giving the statement a weight that's less than 1.  I'll also note that these errors frequently happen in clumps of 2 or 3 at a time.


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