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https://issues.apache.org/jira/browse/HADOOP-3082?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Raghu Angadi updated HADOOP-3082:
---------------------------------
Description:
{{FSNameSystem.setPermission()}} and other permission related calls lock
FSNamesystem across {{getEditLog().logSync()}} unlike other calls. This
increases the negative effect of slower disk on NameNode. Contrast {code}
public synchronized void setPermission(String src, FsPermission permission
) throws IOException {
checkOwner(src);
dir.setPermission(src, permission);
getEditLog().logSync();
}{code}and {code}
public boolean setReplication(String src, short replication)
throws IOException {
boolean status = setReplicationInternal(src, replication);
getEditLog().logSync();
return status;
}
{code}
was:
{{FSNameSystem.setPermission()}} and other permission related calls lock
FSNamesystem across {{getEditLog().logSync()}} unlike other calls. This
increases the negative effect of slower disk on NameNode. Contrast {code}
public synchronized void setPermission(String src, FsPermission permission
) throws IOException {
checkOwner(src);
dir.setPermission(src, permission);
getEditLog().logSync();
}{code}and {code}
public boolean setReplication(String src, short replication)
throws IOException {
boolean status = setReplicationInternal(src, replication);
getEditLog().logSync();
return status;
}
{code}
Summary: setPermssion locks FSNamesystem across logSync. (was:
setPermssion locks FSNamesystem for logSyc.)
> setPermssion locks FSNamesystem across logSync.
> -----------------------------------------------
>
> Key: HADOOP-3082
> URL: https://issues.apache.org/jira/browse/HADOOP-3082
> Project: Hadoop Core
> Issue Type: Bug
> Components: dfs
> Affects Versions: 0.16.0
> Reporter: Raghu Angadi
>
> {{FSNameSystem.setPermission()}} and other permission related calls lock
> FSNamesystem across {{getEditLog().logSync()}} unlike other calls. This
> increases the negative effect of slower disk on NameNode. Contrast {code}
> public synchronized void setPermission(String src, FsPermission permission
> ) throws IOException {
> checkOwner(src);
> dir.setPermission(src, permission);
> getEditLog().logSync();
> }{code}and {code}
> public boolean setReplication(String src, short replication)
> throws IOException {
> boolean status = setReplicationInternal(src, replication);
> getEditLog().logSync();
> return status;
> }
> {code}
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