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From "Uma Maheswara Rao G (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-3360) SNN gets Shutdown if the conf "dfs.namenode.checkpoint.dir" and "dfs.namenode.checkpoint.edits.dir" is configured to more than 6 comma seperated values with 3-4 level in each directories
Date Fri, 11 May 2012 19:12:48 GMT

    [ https://issues.apache.org/jira/browse/HDFS-3360?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13273516#comment-13273516
] 

Uma Maheswara Rao G commented on HDFS-3360:
-------------------------------------------

{code}
I think another good fix to make here would be to fix the variable substitution code to actually
count depth of variable substitutions instead of just the count of variable substitutions.
I'm under the impression that the MAX_SUBST is intended to prevent 20 recursive substitutions
of a single config variable, and didn't consider the case when multiple replacements might
all happen in a single value of a config var.
{code}
I too agree with you. The current code checks only total variable replacements it performed.
Instead of that, each variable replacement itself should check recursively up to MAX_SUBST
I feel. 
                
> SNN gets Shutdown if the conf "dfs.namenode.checkpoint.dir" and "dfs.namenode.checkpoint.edits.dir"
is configured to more than 6 comma seperated values with 3-4 level in each directories
> ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-3360
>                 URL: https://issues.apache.org/jira/browse/HDFS-3360
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: name-node
>    Affects Versions: 2.0.0, 3.0.0
>            Reporter: J.Andreina
>            Priority: Minor
>
> Configured "dfs.namenode.checkpoint.dir" and "dfs.namenode.checkpoint.edits.dir" to more
than 6 comma seperated directories 
>  Started NN,DN,SNN
>  Secondary Namenode gets shutdown without throwing any exception
> But the descriptions says that "If this is a comma-delimited list of directories then
the image is
> replicated in all of the directories for redundancy."
> SNN logs
> ========
> {noformat}2012-04-26 13:08:37,534 INFO org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode:
STARTUP_MSG: 
> /************************************************************
> STARTUP_MSG: Starting SecondaryNameNode
> STARTUP_MSG:   host = HOST-xx-xx-xx-xx/xx.xx.xx.xx
> STARTUP_MSG:   args = []
> STARTUP_MSG:   version = 2.0.0-SNAPSHOT
> STARTUP_MSG:   build =  -r ; compiled by 'isap' on Fri Apr 20 09:10:53 IST 2012
> ************************************************************/
> 2012-04-26 13:08:38,728 INFO org.apache.hadoop.metrics2.impl.MetricsConfig: loaded properties
from hadoop-metrics2.properties
> 2012-04-26 13:08:38,861 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Scheduled
snapshot period at 10 second(s).
> 2012-04-26 13:08:38,861 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: SecondaryNameNode
metrics system started
> 2012-04-26 13:08:39,176 INFO org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode:
SHUTDOWN_MSG: 
> /************************************************************
> SHUTDOWN_MSG: Shutting down SecondaryNameNode at HOST-xx-xx-xx-xx/xx.xx.xx.xx
> ************************************************************/{noformat}

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