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First of all, you have to apply the latest patch set i.e. 10.1.2.3 & then final cumulative patch. But to fix this issue on temporary basis, you have to do some performance tuning to the oracle application server components. Some recommended changes to avoid getting this issue are as follows:
1.Set "-Xms256M -Xmx1024M" for OC4J_BI_Forms, to some more memoryi.e.
<java-option value="-client -Xms256M -Xmx1024M> in opmn.xml
2. Edit OH/discoverer/util/pref.txt, take backup and set the following to some higher value.
MaxVirtualDiskMem = 1024000000
MaxVirtualHeapMem = 2024000000
Please note the increased value for memory should be less than the existing memory i.e. available for Oracle application server.