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question asked: Aug 24 '12, 11:34 a.m.
question was seen: 5,210 times
last updated: Aug 28 '12, 11:06 a.m.

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CLM 2012 (4.0), Tomcat and HADR (DB2)

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Ken Werner (21●2●2●5) | asked Aug 24 '12, 11:34 a.m.
Hi there,
Does anyone know if the automatic client re-routing feature in a HADR setup works when using Tomcat? What I observe in case of a takeover is that the CLM fails to connect to the database (SQLCODE -1776). It looks like CLM doesn't necessarily have an active JDBC connectionand and therefore it doesn't get the SQL-exception (SQLCODE -4498) that tells the CLM's DB2-JDBC driver about the alternate DB-server. Any attempt of the CLM to create a new connection to its configured DB host (the primary DB-node) fails.
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Ken Werner commented Aug 24 '12, 11:35 a.m.

also see the comments at the end of the following article: https://jazz.net/library/article/464

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Ken Werner (21●2●2●5) | answered Aug 28 '12, 11:06 a.m.
Problem solved! : )
It turns out the JDBC Driver wants to connect to the alternate DB host directly which was prevented by a firewall in our case.

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