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From Jeffrey Wang <jw...@palantir.com>
Subject hinted handoff sleeping
Date Thu, 23 Jun 2011 21:55:19 GMT
Hey all,

 

We're running a slightly patched version of 0.7.3 on a cluster of 5 nodes.
I've been noticing a number of messages in our logs which look like this
(after a node goes "down" and comes back up, usually just due to a GC):

 

2011-06-23 14:46:35,381 INFO [HintedHandoff:1]
org.apache.cassandra.db.HintedHandOffManager.deliverHintsToEndpoint(HintedHa
ndOffManager.java:290) {USER='',IP=''} - Sleeping 32649ms to stagger hint
delivery

 

The interesting thing is that we have hinted_handoff_enabled = false in the
YAML configuration, so it always says 0 rows are handed off (later, after
the sleep). Thus this sleeping seems quite wasteful. Is this part of the
code supposed to be reach even with hinted handoff disabled? Thanks.

 

-Jeffrey

 


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