[HDFS-6856] Send an OOB ack asynchronously

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: datanode
• Assignee: Brandon Li
• Reporter: Brandon Li
• Created: 15/Aug/14 23:41
• Updated: 15/Aug/14 23:42

Description

As kihwal pointed out in HDFS-6569,:
"One bad client may block this and prevent the message from being sent to the rest of "good" clients. Unless a new thread is created (during shutdown!) to send an OOB ack asynchronously, the blocking ack.readFields() call needs to be changed in order to delegate the message transmission to the responder thread. "

This JIRA is to track the effort of sending OOB ack asynchronously.

Issue Links

• is related to: HDFS-6569 OOB message can't be sent to the client when DataNode shuts down for upgrade