David Mollitor created HDFS-14843:
-------------------------------------
Summary: Double Synchronization in BlockReportLeaseManager
Key: HDFS-14843
URL: https://issues.apache.org/jira/browse/HDFS-14843
Project: Hadoop HDFS
Issue Type: Improvement
Reporter: David Mollitor
{code:java|title=BlockReportLeaseManager.java}
private synchronized long getNextId() {
long id;
do {
id = nextId++;
} while (id == 0);
return id;
}
{code}
This is a private method and is synchronized, however, it is only be accessed
from an already-synchronized method. No need to double-synchronize.
https://github.com/apache/hadoop/blob/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockReportLeaseManager.java#L183-L189
https://github.com/apache/hadoop/blob/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockReportLeaseManager.java#L227
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