NullPointerException when using EmailRouter in SOA-P 5.3

Solution In Progress - Updated -

Environment

  • Red Hat JBoss SOA Platform
    • 5.3.1

Issue

We often get the following stack trace which leads to messages going to the DLQ. It looks to be caused by a null email address, however if you look at the first line of the log, there are 'from' and 'to' fields set in the message properties, so I don't know why that would be the case. The error also appears to happen sporadically and is exacerbated under high load - although I've never seen a NPE due to high load before.

    ERROR [org.jboss.resource.adapter.jms.inflow.JmsServerSession] Unexpected error delivering message ObjectMessage={ JMSCorrelationID:1a7d743a,JMSDeliveryMode:2,JMSDestination:Queue 'queue/email-queue',JMSExpiration:0,JMSMessageID:ID:130,JMSPriority:0,JMSRedelivered,JMSTimestamp:1415890730845,JMSProperties:{sendTo:support@redhat.com,subject:Test Mail from JBossESB],from:foo@bar.com},Payload:{Binary Attachment:len=3747} }
java.lang.NullPointerException
    at javax.mail.internet.InternetAddress.parse(InternetAddress.java:615)
    at javax.mail.internet.InternetAddress.parse(InternetAddress.java:575)
    at javax.mail.internet.InternetAddress.<init>(InternetAddress.java:107)
    at org.jboss.soa.esb.helpers.Email.addMessageAddressing(Email.java:401)
    at org.jboss.soa.esb.helpers.Email.createMailMessage(Email.java:386)
    at org.jboss.soa.esb.helpers.Email.getMailMessage(Email.java:239)
    at org.jboss.soa.esb.helpers.Email.sendMessage(Email.java:229)
    at org.jboss.soa.esb.actions.routing.email.Emailer.sendEmail(Emailer.java:184)
    at org.jboss.soa.esb.actions.routing.email.Emailer.sendEmail(Emailer.java:141)
    at org.jboss.soa.esb.actions.routing.email.EmailRouter.route(EmailRouter.java:78)
    at org.jboss.soa.esb.actions.routing.AbstractRouter.process(AbstractRouter.java:80)
    at org.jboss.soa.esb.actions.routing.email.EmailRouter.process(EmailRouter.java:70)
    at org.jboss.soa.esb.listeners.message.ActionProcessingPipeline.processPipeline(ActionProcessingPipeline.java:667)
    at org.jboss.soa.esb.listeners.message.ActionProcessingPipeline.processPipeline(ActionProcessingPipeline.java:614)
    at org.jboss.soa.esb.listeners.message.ActionProcessingPipeline.process(ActionProcessingPipeline.java:442)
    at org.jboss.soa.esb.listeners.jca.JcaMessageAwareListener.process(JcaMessageAwareListener.java:163)
    at org.jboss.soa.esb.listeners.jca.JcaJMSInflowMessageProcessorAdapter.onMessage(JcaJMSInflowMessageProcessorAdapter.java:44)
    at sun.reflect.GeneratedMethodAccessor728.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.jboss.soa.esb.listeners.jca.BaseJcaInflow$1.invoke(BaseJcaInflow.java:210)
    at org.jboss.soa.esb.listeners.jca.EndpointProxy.delivery(EndpointProxy.java:271)
    at org.jboss.soa.esb.listeners.jca.EndpointProxy.invoke(EndpointProxy.java:163)
    at $Proxy631.onMessage(Unknown Source)
    at org.jboss.resource.adapter.jms.inflow.JmsServerSession.onMessage(JmsServerSession.java:179)

Resolution

If the EmailRouter action is used in a dynamic fashion - fields such as from, to, etc. are populated on a per message basis - it is required to limit the thread count on the service to 1 to avoid multi-threading issues.

Root Cause

The EmailRouter action is thread safe only if used in a static context, when all fields of the email are defined in jboss-esb.xml at design time. A bugzilla1 has been created to ensure thread safety when used in a dynamic fashion, to be implemented in a future SOA-P version.

  1. https://bugzilla.redhat.com/show_bug.cgi?id=1168279 ↩

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