The SS hangs, consumes memory, and stops processing SNMP.

Document ID : KB000006237
Last Modified Date : 14/02/2018
Show Technical Document Details
Issue:

After upgrading to Spectrum 10.2 we noticed the SpectroSERVER is consuming more memory, and becomes non-responsive and hangs during shutdown.

Other Symptoms include:

  • SNMP requests are ignored 
  • Updated SNMP communications are missed
  • False Management Agent Lost alarms are generated
  • Online Backups failure, or database synchronization failures
  • SpectroSERVER hangs during shutdown
  • Unexpected memory growth for the SpectroSERVER
Cause:

This was due to code issues in the SpectroSERVERs SNMP layer, and memory leaks found in with VPN and VLAN discoveries.

Resolution:

This issue is resolved in Spectrum 10.2.1, and is addressed with Spectrum_10.02.00.PTF_10.2.029*

* This patch is Spectrum_10.02.00.PTF_10.2.020, with the addition of the fixes for the memory leaks found in the VPN and VLAN codes. See TEC1779157 for more information regarding Spectrum_10.02.00.PTF_10.2.020 (https://www.ca.com/us/services-support/ca-support/ca-support-online/knowledge-base-articles.TEC1779157.html)

 

The Release Notes for this patch are as follows:

This is a Program Temporary Fix (PTF) patch for the following issue:

 

Symptom: Unknown SpectroSERVER memory growth over time.

Resolution: Included all known memory leak fixes included in 10.2.1.

(DE274474, 00650306)

 

Symptom: Rare but consistent SpectroSERVER hangs due to multiple problems with the SNMP subsystem. Symptoms can include failed online backups, failed shutdowns and invalid management agent lost alarms.

Resolution: Major overhaul of SNMP subsystem, designed to improve efficiency and stability. 

(DE198464, 00502985)

 

Symptom: Secure Domain Connector( SDC ) always listens for SNMP traps and SDM connections on all interfaces.

Resolution: Extended Secure Domain Connector( SDC ) functionality to allow IP-specific binding for SNMP traps and SDM connections.

(DE263283, 00627431)

 

Symptom: SpectroSERVER not establishing connection to Secure Domain Connector.

Resolution: Resolved deadlock preventing SDC connections from being established.

(DE277727, 00679511)

 

Symptom: Unknown log-entries in Spectrum Control Panel(VNM.OUT).

Resolution:  Unknown log-entries  are not seen in SCP/VNM.OUT, after the fix.

(DE266961, 00640407)

Additional Information:

Other patches related to the SNMP subsystem overhaul, but do not include the memory leak fixes:

  • Spectrum 10.1.1: Spectrum_10.01.01.PTF_10.1.164 (Defects DE160674, DE19846, DE242230, and DE263054)
  • Spectrum 10.1.2: Spectrum_10.01.02.D101h (Defects DE198464, and DE243874)
  • Spectrum 10.2:    Spectrum_10.02.00.PTF_10.2.020 (Defects DE198464, DE263283, DE277727, and DE266961)