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  1. #1
    Join Date
    May 2008
    Posts
    1

    DB2 SQL Error: SQLSTATE: 40001, SQLERRMC: 68

    Hi,

    I am getting the following exception when there are multiple instances of EJB that try to update the same row in the database. I have a sequence number stored in a properties table and two nodes in a cluster have EJBs running that want to increment this sequence number. The exception is occuring when the code does a save on the hiberate DAO object, to update the row.

    Could someone please tell me what do I need to do to avoid this error? I would really appreciate your help.

    Caused by: com.ibm.db2.jcc.b.SqlException: DB2 SQL error: SQLCODE: -911, SQLSTATE: 40001, SQLERRMC: 68
    at com.ibm.db2.jcc.b.rc.b(rc.java:3180)
    at com.ibm.db2.jcc.a.eb.i(eb.java:227)
    at com.ibm.db2.jcc.a.eb.a(eb.java:183)
    at com.ibm.db2.jcc.a.eb.a(eb.java:34)
    at com.ibm.db2.jcc.a.s.a(s.java:30)
    at com.ibm.db2.jcc.a.h.Gb(h.java:325)
    at com.ibm.db2.jcc.b.rc.R(rc.java:3022)
    at com.ibm.db2.jcc.a.d.f(d.java:1070)
    at com.ibm.db2.jcc.b.r.a(r.java:191)
    at com.ibm.db2.jcc.b.rc.c(rc.java:302)
    at com.ibm.db2.jcc.b.rc.next(rc.java:277)
    at com.ibm.ws.rsadapter.jdbc.WSJdbcResultSet.next(WSJ dbcResultSet.java:2419)
    at org.hibernate.loader.Loader.doQuery(Loader.java:68 5)
    at org.hibernate.loader.Loader.doQueryAndInitializeNo nLazyCollections(Loader.java:224)
    at org.hibernate.loader.Loader.doList(Loader.java:221 1)
    ... 29 more

    Thanks,
    Priya

  2. #2
    Join Date
    May 2003
    Location
    USA
    Posts
    5,734
    You are getting a locktimeout. That means that one of the applications is holding a lock on a resource (probably a row) and another application is trying to acquire an incompatible lock on the same resource. The amount of time the second application waits depends on the setting of locktimeout (in seconds) in the db config. Most people have it set to about 30 seconds (the default is -1 which means wait forever).

    Most likely the first application is not committing after the update (insert, update or delete). A commit will release the lock.
    M. A. Feldman
    IBM Certified DBA on DB2 for Linux, UNIX, and Windows
    IBM Certified DBA on DB2 for z/OS and OS/390

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