[ZBX-17761] CLONE - zabbix generate TCP queue overflow Created: 2020 May 18  Updated: 2020 May 19  Resolved: 2020 May 19

Status: Closed
Project: ZABBIX BUGS AND ISSUES
Component/s: Proxy (P), Server (S)
Affects Version/s: None
Fix Version/s: None

Type: Incident report Priority: Blocker
Reporter: Alan Somers Assignee: Zabbix Support Team
Resolution: Incomplete Votes: 0
Labels: javagateway
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified
Environment:

FreeBSD 10 i386 / x64

Attachments: File patch-src_libs_zbxcomms_comms.c    

 Description   

From time to time generates zabbix a TCP queue overflow.
Then is no traffic from / to ZABBIX more possible, only zabbix restart help here.

 
Mar 12 17:20:17 zabbix-p01 kernel: sonewconn: pcb 0xc809dad4: Listen queue overflow: 193 already in queue awaiting acceptance
Mar 12 17:20:48 zabbix-p01 last message repeated 18 times
Mar 12 17:21:34 zabbix-p01 last message repeated 28 times

 
[root@zabbix-p01 ~]# netstat -Lan
Current listen queue sizes (qlen/incqlen/maxqlen)
Proto Listen         Local Address         
tcp4  0/0/10         127.0.0.1.25           
tcp4  0/0/128        *.22                   
tcp6  0/0/128        *.22                   
tcp4  0/0/128        *.199                  
tcp4  0/0/128        *.11000                
tcp4  193/0/128      *.10051                
tcp4  0/0/128        *.10050                
tcp6  0/0/128        *.10050                
tcp4  0/0/50         *.3306                 
unix  0/0/50         /tmp/mysql.sock
unix  0/0/4          /var/run/devd.pipe

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