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Posted to oak-issues@jackrabbit.apache.org by "Chetan Mehrotra (JIRA)" <ji...@apache.org> on 2013/09/11 07:56:52 UTC

[jira] [Comment Edited] (OAK-946) Improve support for debugging Oak

    [ https://issues.apache.org/jira/browse/OAK-946?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13764023#comment-13764023 ] 

Chetan Mehrotra edited comment on OAK-946 at 9/11/13 5:56 AM:
--------------------------------------------------------------

This patch enables logging of major JCR operations being performed like Node added, property changed etc). 

If DEBUG level logging is enabled for {{org.apache.jackrabbit.oak.jcr.operations}}then the operation details would be logged

Following is the output of running the CRUD test

{noformat}
11:20:12.175 DEBUG [main] SessionDelegate.java:437          session-2 Adding node [hello]
11:20:12.189 DEBUG [main] SessionDelegate.java:437          session-2 Setting property [/hello/world]
11:20:12.191 DEBUG [main] SessionDelegate.java:437          session-2 Session saved
11:20:12.199 DEBUG [main] SessionDelegate.java:437          session-2 Setting property [/hello/world]
11:20:12.199 DEBUG [main] SessionDelegate.java:437          session-2 Session saved
11:20:12.205 DEBUG [main] SessionDelegate.java:437          session-2 Removing node [/hello]
11:20:12.205 DEBUG [main] SessionDelegate.java:437          session-2 Session saved
{noformat}

Such logs simplify debugging conflict related exceptions as one can see operations per session
                
      was (Author: chetanm):
    This patch enables logging of major JCR operations being performed like Node added, property changed etc). 

If DEBUG level logging is enabled for {{org.apache.jackrabbit.oak.jcr.operations}}then the operation details would be logged

Following is the output of running the CRUD test

{noformat}
11:20:12.175 DEBUG [main] SessionDelegate.java:437          session-2 Adding node [hello]
11:20:12.189 DEBUG [main] SessionDelegate.java:437          session-2 Setting property [/hello/world]
11:20:12.191 DEBUG [main] SessionDelegate.java:437          session-2 Session saved
11:20:12.199 DEBUG [main] SessionDelegate.java:437          session-2 Setting property [/hello/world]
11:20:12.199 DEBUG [main] SessionDelegate.java:437          session-2 Session saved
11:20:12.205 DEBUG [main] SessionDelegate.java:437          session-2 Removing node [/hello]
11:20:12.205 DEBUG [main] SessionDelegate.java:437          session-2 Session saved
{noformat}
                  
> Improve support for debugging Oak
> ---------------------------------
>
>                 Key: OAK-946
>                 URL: https://issues.apache.org/jira/browse/OAK-946
>             Project: Jackrabbit Oak
>          Issue Type: Task
>          Components: core, jcr
>    Affects Versions: 0.8
>            Reporter: Chetan Mehrotra
>            Assignee: Chetan Mehrotra
>            Priority: Minor
>         Attachments: OAK-946-2.patch, OAK-946.patch
>
>
> To simplify diagnosing Oak related issues and also runtime debugging we should have some inbuilt support in Oak
> * Way to uniquely identify session, ContentSession and SessionDelegate
> * Look into possibility of exposing session as SLF4j Marker [1] instance while logging
> [1] http://stackoverflow.com/questions/4165558/best-practices-for-using-markers-in-slf4j-logback

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