IT43740: MQ Bridge to SalesForce reports NullPointerExceptions when reconnecting to Salesforce

APAR status

• Closed as program error.

Error description

• Following a temporary loss of network connectivity between the
  IBM MQ Bridge to Salesforce and the Salesforce server, a
  NullPointerException is observed in the Salesforce log, of the
  form:
  
  2023-05-19 07:26:28.006 PDT 36 publishing on topic
  /sf/event/myEvent__e with message len 109
  [HttpClient@1491670877-36] INFO
  org.cometd.bayeux.client.ClientSession - Exception while
  invoking listener com.ibm.mq.runmqsfb.SFMessageListener@1a34267c
  java.lang.NullPointerException
          at
  com.ibm.mq.runmqsfb.SFMessageListener.onMessage(SFMessageListene
  r.java:156)
          at
  org.cometd.common.AbstractClientSession$AbstractSessionChannel.n
  otifyOnMessage(AbstractClientSession.java:602)
          at
  org.cometd.common.AbstractClientSession$AbstractSessionChannel.n
  otifyMessageListeners(AbstractClientSession.java:593)
          at
  org.cometd.common.AbstractClientSession.notifyListeners(Abstract
  ClientSession.java:299)
          at
  org.cometd.common.AbstractClientSession.receive(AbstractClientSe
  ssion.java:265)
          at
  org.cometd.client.BayeuxClient.processMessage(BayeuxClient.java:
  818)
          at
  org.cometd.client.BayeuxClient.processMessages(BayeuxClient.java
  :614)
          at
  org.cometd.client.BayeuxClient.access$3000(BayeuxClient.java:100
  )
          at
  org.cometd.client.BayeuxClient$MessageTransportListener.onMessag
  es(BayeuxClient.java:1191)
          at
  org.cometd.client.transport.LongPollingTransport$2.onComplete(Lo
  ngPollingTransport.java:224)
          at
  org.eclipse.jetty.client.ResponseNotifier.notifyComplete(Respons
  eNotifier.java:193)
          ... ... ...
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  Users of the IBM MQ Bridge to SalesForce.
  
  
  Platforms affected:
  MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  When the IBM MQ Bridge to Salesforce is closing itself down,
  such as in the scenario where it is cleaning up its internal
  state following a network disconnection event between itself and
  the Salesforce server, prior to reconnecting, if the Bridge is
  busy processing received messages from either MQ (if publishing
  to Salesforce) or from Salesforce (to publish to MQ), various
  NullPointerExceptions may be observed in the Salesforce log,
  such as:
  
          2023-05-18 14:52:11.689 PDT [AMQSF037E] Error:
  Publication to Salesforce on topic
  '/sf/mqtosfb/event/fromMQPlatformEvent__e' failed with status
  500 and reason
          [AMQSF037E] Error: Publication to Salesforce on topic
  'fromMQPlatformEvent__e' failed with status 500 and reason
          null
          2023-05-18 14:52:11.689 PDT 51 Removing listener for MQ
  events
          Done.
          Exception in thread "main"
  java.lang.NullPointerException
                  at
  com.ibm.mq.runmqsfb.BridgeMain.cleanupForRetry(BridgeMain.java:5
  98)
                  at
  com.ibm.mq.runmqsfb.BridgeMain.realMain(BridgeMain.java:243)
                  at
  com.ibm.mq.runmqsfb.BridgeMain.main(BridgeMain.java:75)
  

Problem conclusion

• The shutdown order for the various MQ Bridge to SalesForce
  components has been updated to ensure that if messages are still
  being processed from either MQ or Salesforce, components which
  those elements depend on are not closed off before the
  processing of the messages completes.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v9.1 LTS   9.1.0.20
  v9.2 LTS   9.2.0.20
  v9.3 LTS   9.3.0.10
  v9.x CD    9.3.4
  
  The latest available maintenance can be obtained from
  'WebSphere MQ Recommended Fixes'
  http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006037
  
  If the maintenance level is not yet available information on
  its planned availability can be found in 'WebSphere MQ
  Planned Maintenance Release Dates'
  http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006309
  ---------------------------------------------------------------
  

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

  IBM MQ BASE MP

• Fixed component ID

  5724H7271

Applicable component levels