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From "Dmitry Mitko (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-7330) Infinite loop in StreamReader.read during exception condition while running repair
Date Sun, 06 Jul 2014 11:12:34 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-7330?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14053093#comment-14053093
] 

Dmitry Mitko commented on CASSANDRA-7330:
-----------------------------------------

Gents, I had a bad situation in some cassandra (2.0.7) nodes, when they were eaten all CPU
during streaming (during joining node or repairing procedure).
The result is - a huge cpu loading of nodes, slow responses, mistakes in OpsCenter, slow service...
I didn't find anything useful in logs, any weird WARNs or ERRORs. Cassandra behavour is similar
to infinite loop, node manual restarting solves the situation. That's why I decided to write
here.

Can be my situation is the same with yours or it is a different sitatuon?

P.S.: I'll monitor similar problems with Cassandra 2.0.9, of course.

> Infinite loop in StreamReader.read during exception condition while running repair
> ----------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-7330
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7330
>             Project: Cassandra
>          Issue Type: Bug
>         Environment: 2.0.8+
>            Reporter: Joshua McKenzie
>            Assignee: Joshua McKenzie
>            Priority: Minor
>              Labels: Core
>             Fix For: 2.0.9
>
>         Attachments: 7330_v1.txt
>
>
> InputStream.skip is returning -1 during exception conditions which leads the following
logic to infinite loop:
> {code:title=loop}
> protected void drain(InputStream dis, long bytesRead) throws IOException
> {
>     long toSkip = totalSize() - bytesRead;
>     toSkip = toSkip - dis.skip(toSkip);
>     while (toSkip > 0)
>         toSkip = toSkip - dis.skip(toSkip);
> }
> {code}



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