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From "Keith Wall (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (QPID-7023) BDB HA: JE Cleaner warnings written to qpid log during apparently normal operation
Date Wed, 06 Apr 2016 14:46:25 GMT

    [ https://issues.apache.org/jira/browse/QPID-7023?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15228386#comment-15228386
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Keith Wall commented on QPID-7023:
----------------------------------

Change looks reasonable for now.  The fa├žade specific approach to configuration variables
should be retired in favour of plain context variables,  as the end user has no way to know
the settings, nor can they be given annotations.  This should be done a separate Jira.

> BDB HA: JE Cleaner warnings written to qpid log during apparently normal operation 
> -----------------------------------------------------------------------------------
>
>                 Key: QPID-7023
>                 URL: https://issues.apache.org/jira/browse/QPID-7023
>             Project: Qpid
>          Issue Type: Bug
>    Affects Versions: 0.32, qpid-java-6.0
>            Reporter: Keith Wall
>             Fix For: qpid-java-6.0.2, qpid-java-6.1
>
>
> The Java Broker directs JE log log messages to the qpid.log bridging from JUL to SLF4J.
> During operation of the group, with a relatively high transactional publish/consume workload,
messages like this are seen. These are written to all nodes (master and replica) even when
all nodes are on-line:
> {noformat}
> 2016-01-26 08:59:36,360 WARN  [Checkpointer] (BDB) - [mynode1] Cleaner has 3 files not
deleted because they are protected by replication.
> 2016-01-26 08:59:38,966 WARN  [Checkpointer] (BDB) - [mynode1] Cleaner has 2 files not
deleted because they are protected by DbBackup or replication.
> 2016-01-26 08:59:41,646 WARN  [Checkpointer] (BDB) - [mynode1] Cleaner has 2 files not
deleted because they are protected by DbBackup or replication.
> 2016-01-26 08:59:43,987 WARN  [Checkpointer] (BDB) - [mynode1] Cleaner has 1 files not
deleted because they are protected by DbBackup or replication.
> 2016-01-26 08:59:46,494 WARN  [Checkpointer] (BDB) - [mynode1] Cleaner has 2 files not
deleted because they are protected by DbBackup or replication.
> 2016-01-26 08:59:52,588 WARN  [Checkpointer] (BDB) - [mynode1] Cleaner has 1 files not
deleted because they are protected by DbBackup or replication.
> 2016-01-26 09:00:45,684 WARN  [Checkpointer] (BDB) - [mynode1] Cleaner has 2 files not
deleted because they are protected by DbBackup or replication.
> {noformat}
> Additionally replicas see messages like this:
> {noformat}
> 2016-01-26 08:59:36,359 WARN  [Checkpointer] (BDB) - [mynode1] Replication prevents deletion
of 3 files by Cleaner. Start file=0x280 holds CBVLSN 27,742,300, end file=0x287 holds end
VLSN 28,040,638
> {noformat}
> The extent of the backlog never seems to get worse, and there is no functional impact.
> The forum post https://community.oracle.com/thread/2541709 makes me suspect that this
warning might be normal if the backlogs remains 'small'.
> I have reproduced this problem on 0.32 and qpid-java-6.0.  It is possible it occurs on
0.30 too, but there the JE log file was not redirected.



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