PANIC: unable to locate a valid checkpoint record

Hi,

I am using 7.3.2. postmaster prints this on starting up:

----
LOG: database system was interrupted at 2003-02-20 14:23:36 IST
LOG: ReadRecord: bad resource manager data checksum in record at 0/E42144
LOG: invalid primary checkpoint record
LOG: ReadRecord: bad resource manager data checksum in record at 0/E42104
LOG: invalid secondary checkpoint record
PANIC: unable to locate a valid checkpoint record
LOG: startup process (pid 7530) was terminated by signal 6
LOG: aborting startup due to startup process failure
----

pg_resetxlog is able to recover from the problem; but I am concerned because
I can reproduce the scenario very easily. I originally encountered the
problem in 7.2.1; tried upgrading to 7.2.4 and now 7.3.2 and this scenario
happens for every version.

The scenario is like this;

I have an application that is doing database updates using JDBC. I do a
kill -9 on postmaster. The application detects that postmaster is down
and restarts it; I do kill -9 on postmaster. After a couple of such
forced crashes postmaster refuses to come up. The application uses a
PostgreSQL 7.2 JDBC2 driver.

I wrote a python application and tried to recreate the problem but wasn't
successful. However, I can consistently reproduce the problem with the
Java application. Any suggestions on how I can proceed?

Please CC me on any replies; I am not (yet) subscribed to the lists. Thanks.

Ganesan