In SOA 11g we will use to add SyncmaxwaitTime and JTA time out to resolve timeout issues.
In addition to those we will increase the timeouts in below ejb’s.
BPELActivityManagerBean
BPELDeliveryBean
BPELDispatcherBean
BPELEngineBean
BPELFinderBean
BPELInstanceManagerBean
BPELProcessManagerBean
BPELSensorValuesBean
BPELServerManagerBean
In 12c along with above its better to increase in below ejb’s as well.
BPELCacheRegistryBean
BPELCacheStoreBean
BPELClusterBean
BPELKeyGeneratorBean