[KAFKA-10088] The ephemeral node [%s] at %s has gone away while reading it

• Type: Improvement
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 0.10.2.3
• Component/s: core
• Environment: Linux 3.10.0-693.2.2.el7.x86_64
• Assignee: Unassigned
• Reporter: jinshaoling
• Created: 03/Jun/20 03:27
• Updated: 03/Jun/20 03:27

Description

I use kafka 10.0.2 in the production environment, and a problem occurs: the problem should be after the re-election of the controller. due to the relatively large amount of data, the log is soon filled, and soon the alarm of insufficient disk space appears . The log level used in our production environment is "info", and the log is like this:

 The ephemeral node [***] at *** has gone away while reading it 

I downloaded the source code of kafka from github and found in kafka.utils.ZkUtils
CreateCallback#: 
 

case Code.NODEEXISTS =>    zkHandle.getData(path, false, getDataCallback, null) 

 
GetDataCallback#: 

case Code.NONODE => info("The ephemeral node [%s] at %s has gone away while reading it, ".format(data, path)) 

 
one case is Code.NODEEXISTS , but another case is  Code.NONODE. I think this problem should come from zookeeper, but I don’t know why?
Please help me, thanks!