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https://issues.apache.org/jira/browse/HDFS-3526?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13293663#comment-13293663
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Vinay commented on HDFS-3526:
-----------------------------
Hi Brahma,
Thanks for filing this.
There is one more place where namenode will enter to safemode even though it is
standby.
in FSNamesystem.SafeModeInfo.needEnter() we need to change as follows
before fix
{code:java} private boolean needEnter() {
return (threshold != 0 && blockSafe < blockThreshold)
|| (getNumLiveDataNodes() < datanodeThreshold)
|| (!nameNodeHasResourcesAvailable());
}{code}
after fix
{code:java}private boolean needEnter() {
return (threshold != 0 && blockSafe < blockThreshold)
|| (getNumLiveDataNodes() < datanodeThreshold)
|| (!nameNodeHasResourcesAvailable() && !isInStandbyState());
}{code}
I will upload a patch for the same in sometime
> Standy NameNode is entering into Safemode even after HDFS-2914 due to
> resources low
> -----------------------------------------------------------------------------------
>
> Key: HDFS-3526
> URL: https://issues.apache.org/jira/browse/HDFS-3526
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 2.0.1-alpha
> Reporter: Brahma Reddy Battula
> Assignee: Vinay
>
> Scenario:
> =========
> Start ANN SNN with One DN
> Make 100% disk full for SNN
> Now restart SNN..
> Here SNN is going safemode..But it shouldnot happen according to HDFS-2914
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