Is there a firewall between the system WebSphere is on and the database? If so, make sure that both systems are sending keep-alives that are under the firewall timeout. Also, you should have applied the database and Java groups at the same time. If you haven't done that, I would apply them and see if the message goes away.
Matt
-----Original Message-----
From: web400-bounces@xxxxxxxxxxxx [mailto:web400-bounces@xxxxxxxxxxxx] On Behalf Of Mike Cunningham
Sent: Wednesday, August 27, 2008 3:34 PM
To: 'Web Enabling the AS400 / iSeries'
Subject: [WEB400] J2CA0056I: Communication link failure
Is anyone else seeing this error in Websphere? We started getting them in early July after putting on the latest group service pack for HTTP and Websphere
[7/29/08 15:34:22:564 EDT] 0000003c ServiceLogger I com.ibm.ws.ffdc.IncidentStreamImpl open FFDC0009I: FFDC opened incident stream file /QIBM/UserData/WebSphere/AppServer/V61/Express/profiles/PCTWAS61SVR/logs/ffdc/PCTWAS61SVR_0000003c_08.07.29_15.34.22_0.txt
[7/29/08 15:34:22:634 EDT] 0000003c ServiceLogger I com.ibm.ws.ffdc.IncidentStreamImpl resetIncidentStream FFDC0010I: FFDC closed incident stream file /QIBM/UserData/WebSphere/AppServer/V61/Express/profiles/PCTWAS61SVR/logs/ffdc/PCTWAS61SVR_0000003c_08.07.29_15.34.22_0.txt
[7/29/08 15:34:44:891 EDT] 000000bd ServletWrappe I SRVE0242I: [OCH] [/OCH] [/eis/ajax/viewProperty.jsp]: Initialization successful.
[7/29/08 15:34:58:538 EDT] 000000bd ConnectionEve A J2CA0056I: The Connection Manager received a fatal connection error from the Resource Adapter for resource jdbc/pctds. The exception which was received is com.ibm.websphere.ce.cm.StaleConnectionException: Communication link failure. (Connection was dropped unexpectedly.):java.sql.SQLException: Communication link failure. (Connection was dropped unexpectedly.)
[7/29/08 15:34:58:634 EDT] 000000bd SystemOut O SISMenu.getMenu() exception: Communication link failure. (Connection was dropped unexpectedly.)
[7/29/08 15:34:58:634 EDT] 000000bd SystemOut O sessionid: b0850fc1f04b883d6109f45a5be9d8209963f6392795f564d7eab9c016976f11
[7/29/08 15:34:58:634 EDT] 000000bd SystemOut O appName: Housing
[7/29/08 15:34:58:634 EDT] 000000bd SystemOut O uri: /Housing/Status
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