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HDFS-14843. Double Synchronization in BlockReportLeaseManager. Contributed by David Mollitor.

This commit is contained in:
Inigo Goiri 2019-09-24 09:58:42 -07:00
parent 816d3cb908
commit afa1006a53
1 changed files with 2 additions and 6 deletions
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8
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockReportLeaseManager.java
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@ -180,12 +180,8 @@ class BlockReportLeaseManager {
/**
* Get the next block report lease ID. Any number is valid except 0.
*/
private synchronized long getNextId() {
long id;
do {
id = nextId++;
} while (id == 0);
return id;
private long getNextId() {
return ++nextId == 0L ? ++nextId : nextId;
}
public synchronized void register(DatanodeDescriptor dn) {