Logstash stuck on “Sending bulk of actions to client”

Hi,
Has anyone encountered a problem with logstash where there are several
filters (~8 grok filters, multiline and json) that causes logstash to get
stuck when sending bulk of actions to elasticsearch ?

I tried playing with the amount of filters to see if that what causes the
issue.

  • Only multiline and json filters configured - all works well
  • Only grok filters configured - all works well

But when combining them all together, logstash starts to work but just gets
stuck at a very early point on "Sending bulk of actions to client"

Can anyone help me in understanding what's going on here?
I'm using logstash 1.5.0beta and ES 1.4.2

Thanks.

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