[HDFS-13086] Add a field about exception type to BlockOpResponseProto

• Type: Improvement
• Status: Patch Available
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 3.1.0
• Flags: Patch
• Assignee: LiXin Ge
• Reporter: LiXin Ge
• Created: 30/Jan/18 11:29
• Updated: 06/Feb/18 08:24

Description

When user re-read a file in the way of short-circuit reads, it may come across unknown errors due to the reasons that the file has been appended after the first read which changes it's meta file, or the file has been moved away by the balancer.

Such unknown errors will unnecessary disable short-circuit reads for 10 minutes. HDFS-12528 Make the expireAfterWrite of DomainSocketFactory$pathMap configurable to give user a choice of never disable the domain socket. 

We can go a step further that add a field about exception type to BlockOpResponseProto, so that we can Ignore the acceptable FNFE and set a appropriate disable time to handle the unacceptable exceptions when different type of exception happens in the same cluster.

Issue Links

• relates to: HDFS-12528 Add an option to not disable short-circuit reads on failures