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https://issues.apache.org/jira/browse/HDFS-17402?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zilong Zhu updated HDFS-17402:
------------------------------
Description:
After HDFS-17231, NameNode can exit safemode automatically when resources are
from low to available. It used
org.apache.hadoop.hdfs.server.namenode.FSNamesystem#leaveSafeMode, this
function will change BMSafeModeStatus. However, NameNode entering resource low
safe mode doesn't change BMSafeModeStatus in
org.apache.hadoop.hdfs.server.namenode.FSNamesystem#enterSafeMode. This is not
equal
Now:
a. NN enter StartupSafeMode
b. NN enter ResourceLowSafeMode
c. NN resources from low to available
d. NN safemode off
Expectations：
a. NN enter StartupSafeMode
b. NN enter ResourceLowSafeMode
c. NN resources from low to available
d. NN exit ResourceLowSafeMode but in StartupSafeMode
was:
After HDFS-17231, NameNode can exit safemode automatically when resources are
from low to available. It used
org.apache.hadoop.hdfs.server.namenode.FSNamesystem#leaveSafeMode, this
function will change BMSafeModeStatus. However, NameNode entering resource low
safe mode doesn't change BMSafeModeStatus in
org.apache.hadoop.hdfs.server.namenode.FSNamesystem#enterSafeMode. This is not
equal
So, I think StartupSafeMode should not exit when resources are from low to
available
> StartupSafeMode should not exit when resources are from low to available
> ------------------------------------------------------------------------
>
> Key: HDFS-17402
> URL: https://issues.apache.org/jira/browse/HDFS-17402
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Zilong Zhu
> Priority: Major
>
> After HDFS-17231, NameNode can exit safemode automatically when resources are
> from low to available. It used
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem#leaveSafeMode, this
> function will change BMSafeModeStatus. However, NameNode entering resource
> low safe mode doesn't change BMSafeModeStatus in
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem#enterSafeMode. This is
> not equal
> Now:
> a. NN enter StartupSafeMode
> b. NN enter ResourceLowSafeMode
> c. NN resources from low to available
> d. NN safemode off
>
> Expectations：
> a. NN enter StartupSafeMode
> b. NN enter ResourceLowSafeMode
> c. NN resources from low to available
> d. NN exit ResourceLowSafeMode but in StartupSafeMode
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