SA-22235

 SUMMARY

User has configured an email listener and is frequently unable to connect to it.

All the emails to be processed are adding up to error count until restart. Once restarted, it picks up same records and processes them.

Error Messages

Error in logfile:

javax.mail.MessagingException: Connection timed out;
  nested exception is:
    java.net.ConnectException: Connection timed out
    at com.sun.mail.imap.IMAPStore.protocolConnect(IMAPStore.java:571)
    at javax.mail.Service.connect(Service.java:288)
    at com.pega.pegarules.integration.engine.internal.services.email.EmailListener.emailConnect(EmailListener.java:2701)
    at com.pega.pegarules.integration.engine.internal.services.email.EmailListener.oneIteration(EmailListener.java:2312)
    at com.pega.pegarules.integration.engine.internal.services.email.EmailListener.run_(EmailListener.java:2227)
    at com.pega.pegarules.integration.engine.internal.services.listener.ServiceListenerBaseImpl.run(ServiceListenerBaseImpl.java:448)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.net.ConnectException: Connection timed out
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    at java.net.Socket.connect(Socket.java:579)
    at sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:625)
    at sun.security.ssl.BaseSSLSocketImpl.connect(BaseSSLSocketImpl.java:160)
    at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:233)
    at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:163)
    at com.sun.mail.iap.Protocol.<init>(Protocol.java:107)
    at com.sun.mail.imap.protocol.IMAPProtocol.<init>(IMAPProtocol.java:104)
    at com.sun.mail.imap.IMAPStore.protocolConnect(IMAPStore.java:538)

Steps to Reproduce

Not Applicable.

Root Cause

As there are frequent exceptions in the log file, after each exception latency of email listener is being increased based on a pre-defined logic, irrespective of what has been defined on the email listener rule form.

Resolution

Few DSS settings were applied, which were supposed to reduce the latency.

DSS: email/exceptionLatency and DSS: email/initialLatencyTime.

As user's issue persisted which is, sleep time was increasing, causing more latency post exception, the issue is resolved through HFix-24902 .