One of the reason for it could be some hiccup while applying patch.
I would recommend comparing ORACLE_HOME\bpel\system\services\lib\orabpel.ear file sizes in your ORACLE_HOME. In fact, you might want to go trough tedious process of making sure that all files mentioned in post.sh [or .bat] are updated correctly.
- Compare $ORACLE_HOME/bpel/system/services/lib/orabpel.ear with $ORACLE_HOME/j2ee/$CONTAINER/applications/orabpel.ear
- Delete any EAR file if present in $ORACLE_HOME/j2ee/$CONTAINER/application-deployments/ folder
- Check if size of $ORACLE_HOME/bpel/system/j2ee/orabpel.ear equals $PATCH_HOME/files/bpel/system/j2ee/orabpel.ear. If not then move $ORACLE_HOME/bpel/system/j2ee/orabpel.ear to backup directory and copy $PATCH_HOME/files/bpel/system/j2ee/orabpel.ear. You might need to run additional steps as per post.sh (or.bat) file.
- Check if size of $ORACLE_HOME/bpel/system/services/lib/orabpel.ear equals $ORACLE_HOME/j2ee/$CONTAINER/applications/orabpel.ear. if not then move $ORACLE_HOME/j2ee/$CONTAINER/applications/orabpel.ear to backup folder and copy the one from $ORACLE_HOME/bpel/system/services/lib/orabpel.ear
- Repeat same process for hw_services.ear and other files in post.sh (or.bat) file.
