JR42582: IS 8.5.0.1 WITH WAS CLUSTER: DSXIMPORTSERVICE FAILING WITH NO CONNECTION TO THE DATASTAGE REPOSITORY HAS YET BEEN MADE

IBM InfoSphere Information Server, Version 8.5 Fix Pack 3

APAR status

• Closed as program error.

Error description

• On Information Server 8.5.0.1 with WAS Cluster DSXImportService
  failing with the following error:
  
  Server import initiated.
  Attempting authentication..................
  No connection to the DataStage repository has yet been made
  

Local fix

• DSImportService fails when making a call to a different node
  than where the login was done due to WAS session cache
  replication delays.  WAS was not able to propagate the
  cache to all nodes of the cluster before the next  EJB request
  came in.
  
  To workaround the issue stop all but 1 Node in the cluster,
  this forces all requests to the same app server so the cache
  propagation is not needed.
  

Problem summary

• The DataStage ImportService implementation was implemented as a
  stateless service which used SessionCache to pass information
  between the DataStage AuthenticationServices and preserve state
  between successive method calls.
  In practice this did not work on a multi-node WAS cluster
  leading to errors like "No repository connection has yet been
  made." which occur because the service has been called on a
  node to which the session cache cupdates have not yet
  propagated.
  

Problem conclusion

• Changed DataStage ImportService to be a Stateful service whihc
  ensures that all method calls for a given session are routed to
  a single node avoiding the need for session cache propagation.
  

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

  WIS DATASTAGE

• Fixed component ID

  5724Q36DS

Applicable component levels

• R850 PSY

     UP