Elasticsearch logs missing

Why ES logs gone missing ? In between this period there was some issue
but no details logged. Nothing in OS logs.

Last Logged time stamp in previous days log

[2014-11-04 20:27:04,186][DEBUG][action.search.type ] [es-orn-d-01]
All shards failed for phase: [query_fetch]

First log in next days log file :

[*2014-11-05 13:47:53,*912][DEBUG][http.netty ] [es-orn-d-01]
Caught exception while handling client http traffi
c, closing connection [id: 0xfc63dd89, / =>


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