[HDFS-4315] DNs with multiple BPs can have BPOfferServices fail to start due to unsynchronized map access

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.2-alpha
• Fix Version/s: 2.0.3-alpha, 0.23.6
• Component/s: datanode
• Target Version/s: 2.0.3-alpha
• Hadoop Flags: Reviewed
• Assignee: Aaron T. Myers
• Reporter: Aaron T. Myers
• Created: 15/Dec/12 00:48
• Updated: 15/Feb/13 13:12
• Resolved: 17/Dec/12 07:54

Description

In some nightly test runs we've seen pretty frequent failures of TestWebHdfsWithMultipleNameNodes. I've traced the root cause to an unsynchronized map access in the DataStorage class.

More details in the first comment.