If you use the LDAP-Search method and the driver shuts down with a java.lang.OutOfMemoryError:
Try setting or increasing the DHOST_JVM_INITIAL_HEAP and DHOST_JVM_MAX_HEAP environment variables.
Restart the driver.
Monitor the driver to make sure that the variables provide enough memory.
For more information, see Configuring Java Environment Parameters
in the NetIQ Identity Manager Driver Administration Guide.