I have a CMP entity bean mapped onto a database table containing 100
records, each record contains a primary key integer and a data field of
size 64Kbytes.
My client repeatedly finds a record chosen at random and gets the data
field. After about 90 records (i.e. about 6M of data) have been
retrieved I get the following exception from the EJBServer:
EntitySynchroImpl.beforeCompletion() : java.lang.OutOfMemoryError:
The EJBServer continues, however, and subsequently the retrievals
generate this exception intermittently. Sometimes the exception is
passed onto the client, other times the retrieval completes but takes
longer than normal (e.g. 10 seconds rather than 2).
In our project we will typically be throwing around large amounts of
data.
If I can do anything to provide more information please let me know.
BTW if I use java -Xmx to make a very large amount of memory available,
the exceptions don't occur (presumably the problem is delayed beyond the
limit of my testing), but occasionally the data retrieval takes up to 60
seconds. What's going on, is that just the garbage collector?
I'm using JDK1.2 on Linux i586 with no JIT compiler, as far as I know
there isn't one available.
Oh yes, I _am_ using Jonas 1.5
Thanks for reading
Jonathan
--
Jonathan Whitehead
Sema Group sae
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