[HADOOP-5854] findbugs : fix "Inconsistent Synchronization" warnings in hdfs

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.21.0
• Hadoop Flags: Reviewed
• Assignee: Raghu Angadi
• Reporter: Raghu Angadi
• Created: 15/May/09 22:12
• Updated: 24/Aug/10 20:37
• Resolved: 16/May/09 01:34

Description

This jira fixes the following findbugs warnings :

• Inconsistent synchronization of org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.closed; locked 75% of time
• Inconsistent synchronization of org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.persistBlocks; locked 66% of time
• Inconsistent synchronization of org.apache.hadoop.hdfs.server.common.UpgradeManager.currentUpgrades; locked 61% of time
• Inconsistent synchronization of org.apache.hadoop.hdfs.server.common.UpgradeManager.upgradeState; locked 75% of time
• Inconsistent synchronization of org.apache.hadoop.hdfs.server.namenode.FSDirectory.ready; locked 50% of time
• Inconsistent synchronization of org.apache.hadoop.hdfs.server.datanode.DataBlockScanner.verificationLog; locked 45% of time
• Inconsistent synchronization of org.apache.hadoop.hdfs.server.namenode.FSNamesystem.safeMode; locked 48% of time
• Inconsistent synchronization of org.apache.hadoop.hdfs.server.namenode.FSNamesystem$SafeModeInfo.extension; locked 80% of time
• Inconsistent synchronization of org.apache.hadoop.io.SequenceFile$Reader.sync; locked 85% of time