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**ERROR: hub: hubmanager: cannot link "/<TIM_HOME>/apmpacket/data/pcap/clients/tim/<filename>.pcap to /<TIM_HOME>/apmpacket/data/pcap/clients/tim/<worker#>/<filename>.pcap". No such file or directory

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Article ID: 41777

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Updated On:

Products

CA Application Performance Management Agent (APM / Wily / Introscope) INTROSCOPE

Issue/Introduction

 Issue: 

 TIM is running with repeated errors in its TIM log. Because of this, we are not able to properly monitor the applications. 

 

 In TIM log, we see a lot of errors like: 

 

---------------------------------------------------------------------------- 

 **ERROR: hub: hubmanager: cannot link "/<TIM_HOME>/apmpacket/data/pcap/clients/tim/1461067800_1000.pcap" to  "/<TIM_HOME>/apmpacket/data/pcap/clients/tim/w22/1461067800_1000.pcap": No such file or directory 

---------------------------------------------------------------------------- 

 

 All TIM configurations are set to default including balancer.cnf. Its network interfaces are configured correctly and there is traffic. TIM status showing packets captured as well. No dropped packets.  

 

 Environment:  

 Linux. APM 10.1.

 

 Cause: 

 This is due to apmpacket is running out of buffer space to handle the incoming traffic. It is necessary to configure apmpacket to use memory-based file system to save buffer space at run-time.

 

 Resolution/Workaround:

 You need to mount BOTH apmpacket's pcap and tim logs directories to tmpfs, as following:

 1. Commands to run in order for pcap directory:

   a. service tim stop 

   b. service apmpacket stop 

   c. echo "tmpfs /<TIM_HOME>/apmpacket/data/pcap tmpfs defaults,noatime,mode=0744 0 0" >> /etc/fstab 

   d. mount /<TIM_HOME>/apmpacket/data/pcap 

   e. df -k (to verify) 

   f. service apmpacket start 

   g. service tim start 

 

 2. Commands to run in order for TIM logs directory:

   a. cd <TIM_HOME>

   b. service tim stop 

   c. mv logs logs.static 

   d. mkdir logs 

   e. chown apache logs 

   f. echo "tmpfs /<TIM_HOME>/tim/logs tmpfs defaults,noatime,size=1200M,mode=0755,uid=apache 0 0" >> /etc/fstab 

   g. mount /<TIM_HOME>/tim/logs 

   h. cp -aR logs.static/* logs/ 

   i. df -k (to verify)  

   j. service tim start 

 

Additional Information:

 

Install and Configure TIM for CA CEM

Environment

Release: CEMUGD00200-10.1-Introscope to CA Application-Performance Management-Upgrade Mai
Component: