Cluster submission taking longer time than expected

2015-10-07 11:22:22,134 INFO  - [main:] ~ Request Url: http://192.168.138.236:16000/api/entities/submit/cluster?user.name=pragya (BaseRequest:174)
2015-10-07 11:22:22,134 INFO  - [main:] ~ Request Method: POST (BaseRequest:175)
2015-10-07 11:22:22,134 INFO  - [main:] ~ Request Header: Name=Content-Type Value=text/xml (BaseRequest:178)
2015-10-07 11:23:50,693 WARN  - [main:] ~ Invalid cookie header: "Set-Cookie: hadoop.auth="u=pragya&p=pragya&t=simple&e=1444233142648&s=ChbQsNc1emLmGvLWpz3i0qrDS58="; Path=/; Domain=; Expires=Wed, 07-Oct-2015 15:52:22 GMT; HttpOnly". Blank or null value for domain attribute (ResponseProcessCookies:129)
2015-10-07 11:23:50,693 INFO  - [main:] ~ Response Status: HTTP/1.1 200 OK (BaseRequest:204)

2015-10-07 05:52:22,811 INFO  - [1045961891@qtp-771775563-46 - 9dd32791-d2ef-4e98-aac3-0e362f1c26c0:pragya:POST//sync/submit/cluster] ~ CLUSTER/A4dcc0afc-440238bf is published into config store (AUDIT:229)
2015-10-07 05:52:22,811 INFO  - [1045961891@qtp-771775563-46 - 9dd32791-d2ef-4e98-aac3-0e362f1c26c0:pragya:POST//sync/submit/cluster] ~ Submit successful: (cluster): A4dcc0afc-440238bf (AbstractEntityManager:432)
2015-10-07 05:52:22,812 DEBUG - [1045961891@qtp-771775563-46 - 9dd32791-d2ef-4e98-aac3-0e362f1c26c0:] ~ Audit: pragya/192.168.138.236 performed request http://192.168.138.236:15000/secure/sync/submit/cluster?colo=ua1&&user.name=pragya (192.168.138.236) at time 2015-10-07T05:52Z (FalconAuditFilter:86)
2015-10-07 05:54:43,140 INFO  - [Thread-11:] ~ config.location is set, using: /mnt/falcon/server/conf/runtime.properties (ApplicationProperties:108)
2015-10-07 05:54:43,141 INFO  - [Thread-11:] ~ Initializing org.apache.falcon.util.RuntimeProperties properties with domain falcon (ApplicationProperties:145)