Weblogic Server failed to start because of java.lang.NumberFormatException: null

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Applies to:
Weblogic: 10.3.6
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Problem Summary:
Unable to start admin server because of java.lang.NumberFormatException: null

Error:
####<Aug 15, 2014 5:26:31 AM CDT> <Critical> <WebLogicServer> <AdminServer> <Main Thread> <> <> <> <> <BEA-000386> <Server subsystem failed. Reason: java.lang.NumberFormatException: null
java.lang.NumberFormatException: null
at java.lang.Integer.parseInt(Integer.java:415)
at java.lang.Integer.parseInt(Integer.java:497)
at weblogic.ldap.EmbeddedLDAP.validateVDEDirectories(EmbeddedLDAP.java:1035)
at weblogic.ldap.EmbeddedLDAP.start(EmbeddedLDAP.java:212)
at weblogic.t3.srvr.SubsystemRequest.run(SubsystemRequest.java:64)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:181)

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Root Cause:
This is something that happens infrequently and is the result of a corrupted file in the embedded LDAP. This might caused due to the space issue on the box.

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Resolution:
Follow the below steps to resolve the issue,
1. Delete the file /servers/<server_name>/data/ldap/config/replicas.prop
    OR
    Alter the replicas.prop file and add 'replica.num=0' to it.
2. Start server.