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[HDFS-15789] Lease renewal does not require namesystem lock. Contributed by Daryn Sharp and Jim Brennan. 

(cherry picked from commit f565476939)
This commit is contained in:
Jim Brennan 2021-01-28 18:17:15 +00:00
parent 7943b31c29
commit dfe23ab6ba
1 changed files with 4 additions and 8 deletions
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12
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
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@ -3800,14 +3800,10 @@ public class FSNamesystem implements Namesystem, FSNamesystemMBean,
*/
void renewLease(String holder) throws IOException {
checkOperation(OperationCategory.WRITE);
readLock();
try {
checkOperation(OperationCategory.WRITE);
checkNameNodeSafeMode("Cannot renew lease for " + holder);
leaseManager.renewLease(holder);
} finally {
readUnlock("renewLease");
}
checkNameNodeSafeMode("Cannot renew lease for " + holder);
// fsn is not mutated so lock is not required. the leaseManger is also
// thread-safe.
leaseManager.renewLease(holder);
}
/**