[ZOOKEEPER-1100] Killed (or missing) SendThread will cause hanging threads

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.3.3
• Fix Version/s: 3.5.0
• Component/s: java client

Environment

http://mail-archives.apache.org/mod_mbox/zookeeper-user/201106.mbox/%3Citpgb6$2mi$[e-mail]%3E

• Hadoop Flags: Incompatible change
• Assignee: Camille Fournier
• Reporter: Gunnar Wagenknecht
• Created: 21/Jun/11 09:24
• Updated: 03/Mar/16 01:37
• Resolved: 26/Dec/11 15:56

Description

After investigating an issues with hanging threads I noticed that any java.lang.Error might silently kill the SendThread. Without a SendThread any thread that wants to send something will hang forever.

Currently nobody will recognize a SendThread that died. I think at least a state should be flipped (or flag should be set) that causes all further send attempts to fail or to re-spin the connection loop.

Issue Links

• is duplicated by: ZOOKEEPER-1186 ZooKeeper client seems to hang quietly on OutOfMemoryError