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https://issues.apache.org/jira/browse/CHUKWA-668?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13501454#comment-13501454
]
Hudson commented on CHUKWA-668:
-------------------------------
Integrated in Chukwa-trunk #460 (See
[https://builds.apache.org/job/Chukwa-trunk/460/])
CHUKWA-668. Fix infinite loop in FileTailingAdaptor. (Sourygna Luangsay via
Eric Yang) (Revision 1411818)
Result = SUCCESS
eyang : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1411818
Files :
* /incubator/chukwa/trunk/CHANGES.txt
*
/incubator/chukwa/trunk/src/main/java/org/apache/hadoop/chukwa/datacollection/adaptor/filetailer/FileTailingAdaptor.java
*
/incubator/chukwa/trunk/src/main/java/org/apache/hadoop/chukwa/datacollection/adaptor/filetailer/LWFTAdaptor.java
*
/incubator/chukwa/trunk/src/test/java/org/apache/hadoop/chukwa/datacollection/adaptor/filetailer/TestFileTailingAdaptors.java
> Infinite loop in FileTailingAdaptor
> -----------------------------------
>
> Key: CHUKWA-668
> URL: https://issues.apache.org/jira/browse/CHUKWA-668
> Project: Chukwa
> Issue Type: Bug
> Components: Data Collection
> Affects Versions: 0.6.0
> Reporter: Sourygna Luangsay
> Assignee: Sourygna Luangsay
> Fix For: 0.6.0
>
> Attachments: chukwa-668-2.patch, chukwa-668.patch
>
>
> In LWFTAdaptor.java, lastSlurpTime is never updated, triggering an infinite
> loop if we use the
> adaptor FileTailingAdaptor and subclass adaptors.
> Loop occurs like this:
> 1) lastSlurpTime is never changed and thus always 0.
> 2) we append some data to the log file and we do a normal slurp
> 3) after this slurp, we have: len == fileReadOffset && fixedNameLastModified
> > lastSlurpTime
> thus we think log file has rotated when it hasn't: fileReadOffset is reset
> to 0
> 4) we get: len > fileReadOffset and so we do a slurp of len bytes.
> 5) we are in the same situation as 3) -> infinite loop: the agent never
> stops sending chunks
> to the collector although log files does not change.
> It seems like this bug comes from CHUKWA-646. The first patch tailfile.patch
> seemed to do it
> right but in the second patch, the line "lastSlurpTime =
> System.currentTimeMillis();" just
> disapeared from LWFTAdaptor.java.
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