Keith Wall created QPID-7023:
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Summary: 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: qpid-java-6.0, 0.32
Reporter: Keith Wall
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 work fully transactional
load messages like this are seen 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 extend 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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