Here I have two machines one that runs a Java WebApplication (aplserver) and another for SapDB (dbserver).
dbserver uses: RedHat 9 with SapDB 7.3 (X32|LINUX 7.3.0 Build 040-000-091-740)
In logs of Java WebApplication are follow error:
com.sap.dbtech.jdbc.exceptions.JDBCDriverException: SAP DBTech JDBC: Cannot connect to jdbc:sapdb://dbserver/ISDB [Task limit].
In knldiag of SapDB I have following types of messages in many lines near of time when server stops, some samples are:
....
2003-12-04 13:20:46 3207 WNG 11832 COMMUNIC rejecting request
2003-12-04 13:20:55 3207 WNG 11837 COMMUNIC ALL are busy (in all UKTs)
2003-12-04 13:20:55 3207 11580 COMMUNIC e84_find: UKT3 T5 conn 0 'Connect wait '
2003-12-04 13:20:55 3207 11580 COMMUNIC e84_find: UKT6 T37 conn 1070551072 'Command wait '
2003-12-04 13:20:55 3207 11580 COMMUNIC e84_find: UKT6 T38 conn 1070551077 'Command wait '
2003-12-04 13:20:55 3207 11580 COMMUNIC e84_find: UKT6 T39 conn 1070551077 'Command wait '
....
after restart of SapDB and WebApplication all works fine, but now I checked my logs to see if I can discover the cause and found follow logs in knldiag file:
...
2003-12-04 13:48:41 3185 11561 COMMUNIC Connected T37 aplserver 0
2003-12-04 13:48:41 3185 11509 COMMUNIC Connection broken by appl state 10 T37
2003-12-04 13:48:41 3185 WNG 11824 COMMUNIC Releasing T37 connection aborted
2003-12-04 13:48:41 3185 11007 COMMUNIC wait for connection T37
2003-12-04 13:48:44 3185 11561 COMMUNIC Connected T37 aplserver 0
2003-12-04 13:48:44 3185 11560 COMMUNIC Releasing T37
2003-12-04 13:48:44 3185 11007 COMMUNIC wait for connection T37
....
then my questions are:
1) The error occurs in aplserver or dbserver? I think in dbserver. But don't have any idea because.
2) How can I avoid to this occur another time?
3) What the cause of Connection broken by appl state?
any tips are welcome
thanks
Clovis
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