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From "Ariel Weisberg (JIRA)" <j...@apache.org>
Subject [jira] (CASSANDRA-13090) Coalescing strategy sleeps too much
Date Tue, 31 Jan 2017 18:02:51 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-13090?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15847224#comment-15847224
] 

Ariel Weisberg commented on CASSANDRA-13090:
--------------------------------------------

Can you be more specific, maybe link to what you are talking about? I looked at trunk and
3.11 and they look like the patch to me. I also check and they are based off recent trunk
(last commit Jan 27).

I am talking about the dtests where 500 tests fails.

There is this in the logs
{noformat}
ERROR [MessagingService-Outgoing-/127.0.0.1-Gossip] 2017-01-27 22:19:28,638 OutboundTcpConnection.java:334
- error writing to /127.0.0.1
java.lang.NullPointerException: null
	at org.apache.cassandra.io.util.UnbufferedDataOutputStreamPlus.writeUTF(UnbufferedDataOutputStreamPlus.java:256)
~[main/:na]
	at org.apache.cassandra.io.util.BufferedDataOutputStreamPlus.writeUTF(BufferedDataOutputStreamPlus.java:304)
~[main/:na]
	at org.apache.cassandra.gms.GossipDigestSynSerializer.serialize(GossipDigestSyn.java:86)
~[main/:na]
	at org.apache.cassandra.gms.GossipDigestSynSerializer.serialize(GossipDigestSyn.java:81)
~[main/:na]
	at org.apache.cassandra.net.MessageOut.serialize(MessageOut.java:120) ~[main/:na]
	at org.apache.cassandra.net.OutboundTcpConnection.writeInternal(OutboundTcpConnection.java:351)
[main/:na]
	at org.apache.cassandra.net.OutboundTcpConnection.writeConnected(OutboundTcpConnection.java:303)
[main/:na]
	at org.apache.cassandra.net.OutboundTcpConnection.run(OutboundTcpConnection.java:237) [main/:na]
{noformat}

> Coalescing strategy sleeps too much
> -----------------------------------
>
>                 Key: CASSANDRA-13090
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-13090
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Streaming and Messaging
>            Reporter: Corentin Chary
>            Assignee: Corentin Chary
>             Fix For: 3.x
>
>         Attachments: 0001-Fix-wait-time-coalescing-CASSANDRA-13090-2.patch, 0001-Fix-wait-time-coalescing-CASSANDRA-13090.patch
>
>
> With the current code maybeSleep is called even if we managed to take maxItems out of
the backlog. In this case we should really avoid sleeping because it means that backlog is
building up.
> I'll send a patch shortly.



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