zookeeper-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ZOOKEEPER-2684) Fix a crashing bug in the mixed workloads commit processor
Date Fri, 10 Feb 2017 08:07:42 GMT

    [ https://issues.apache.org/jira/browse/ZOOKEEPER-2684?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15860896#comment-15860896
] 

ASF GitHub Bot commented on ZOOKEEPER-2684:
-------------------------------------------

Github user shralex commented on a diff in the pull request:

    https://github.com/apache/zookeeper/pull/167#discussion_r100486459
  
    --- Diff: src/java/main/org/apache/zookeeper/server/quorum/CommitProcessor.java ---
    @@ -251,27 +252,29 @@ public void run() {
                         LinkedList<Request> sessionQueue = pendingRequests
                                 .get(request.sessionId);
                         if (sessionQueue != null) {
    +                        Request topPending = sessionQueue.peekFirst();
                             // If session queue != null, then it is also not empty.
    -                        Request topPending = sessionQueue.poll();
    -                        if (request.cxid != topPending.cxid) {
    -                            LOG.error(
    -                                    "Got cxid 0x"
    -                                            + Long.toHexString(request.cxid)
    -                                            + " expected 0x" + Long.toHexString(
    -                                                    topPending.cxid)
    -                                    + " for client session id "
    -                                    + Long.toHexString(request.sessionId));
    -                            throw new IOException("Error: unexpected cxid for"
    -                                    + "client session");
    +                        // we can get commit requests for requests before we even get
this session
    +                        //(see ZOOKEEPER-2684). We will just pass those commits to the
next processor.
    --- End diff --
    
    please remove the new comments from here and add them inside the if, where this case is
handled.


> Fix a crashing bug in the mixed workloads commit processor
> ----------------------------------------------------------
>
>                 Key: ZOOKEEPER-2684
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2684
>             Project: ZooKeeper
>          Issue Type: Bug
>          Components: server
>    Affects Versions: 3.6.0
>         Environment: with pretty heavy load on a real cluster
>            Reporter: Ryan Zhang
>            Assignee: Ryan Zhang
>            Priority: Blocker
>         Attachments: ZOOKEEPER-2684.patch
>
>
> We deployed our build with ZOOKEEPER-2024 and it quickly started to crash with the following
error
> atla-buh-05-sr1.prod.twttr.net: 2017-01-18 22:24:42,305 - ERROR [CommitProcessor:2] -org.apache.zookeeper.server.quorum.CommitProcessor.run(CommitProcessor.java:268)
– Got cxid 0x119fa expected 0x11fc5 for client session id 1009079ba470055
> atla-buh-05-sr1.prod.twttr.net: 2017-01-18 22:32:04,746 - ERROR [CommitProcessor:2] -org.apache.zookeeper.server.quorum.CommitProcessor.run(CommitProcessor.java:268)
– Got cxid 0x698 expected 0x928 for client session id 4002eeb3fd0009d
> atla-buh-05-sr1.prod.twttr.net: 2017-01-18 22:34:46,648 - ERROR [CommitProcessor:2] -org.apache.zookeeper.server.quorum.CommitProcessor.run(CommitProcessor.java:268)
– Got cxid 0x8904 expected 0x8f34 for client session id 51b8905c90251
> atla-buh-05-sr1.prod.twttr.net: 2017-01-18 22:43:46,834 - ERROR [CommitProcessor:2] -org.apache.zookeeper.server.quorum.CommitProcessor.run(CommitProcessor.java:268)
– Got cxid 0x3a8d expected 0x3ebc for client session id 2051af11af900cc
> clearly something is not right in the new commit processor per session queue implementation.



--
This message was sent by Atlassian JIRA
(v6.3.15#6346)

Mime
View raw message