JR63212: IBM WORKFLOW SERVER MIGHT RUN SLOWER BECAUSE OF CONTENTION WHEN CREATING A NEW UUID

workflow.2102.delta.repository

APAR status

• Closed as program error.

Error description

• IBM Workflow Server might show down. When that happens, you
  might see increased number of threads that cause contention
  between threads.
  
  Also, you might see following stack trace:
         at
  java.security.SecureRandom.nextBytes(SecureRandom.java:471)
         at java.util.UUID.randomUUID(UUID.java:156)
         at
  com.lombardisoftware.core.TWUUID.newUUID(TWUUID.java:70)
         at
  com.lombardisoftware.core.TWObjectMetaData.<init>(TWObjectMetaDa
  ta.java:114)
         at
  com.lombardisoftware.core.TWObject.<init>(TWObject.java:317)
  
  In the logs, you might see messages like following for the hung
  threads:
  
  [1/25/21 9:45:57:981 CET] 0000003c ThreadMonitor W  WSVR0605W:
  Thread "WebContainer : 72" (00091f8f) has been active for 726924
  milliseconds and may be hung. There is/are 8 thread(s) in total
  in the server that may be hung.
         at
  java.security.SecureRandom.nextBytes(SecureRandom.java:471)
         at java.util.UUID.randomUUID(UUID.java:156)
         at
  com.lombardisoftware.core.TWUUID.newUUID(TWUUID.java:70)
         at
  com.lombardisoftware.core.TWObjectMetaData.<init>(TWObjectMetaDa
  ta.java:114)
         at
  com.lombardisoftware.core.TWObject.<init>(TWObject.java:317)
  
  PRODUCTS AFFECTED
  IBM Business Automation Workflow
  

Local fix

• Periodically, restart the AppTarget JVM.
  

Problem summary

• No additional information is available.
  

Problem conclusion

• A fix is available or will be available that removes unnecessary
   UUID generation, which lead to contention between threads, and
  returns Workflow Server to running normally.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  BUS AUTO WORKFL

• Fixed component ID

  5737H4100

Applicable component levels