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From Hontvári József Levente <hontv...@flyordie.com>
Subject hinted handoff 16 s delay
Date Thu, 23 Feb 2012 21:46:46 GMT
I have played with a test cluster, stopping cassandra on one node and 
updating a row on another. I noticed a delay in delivering hinted 
handoffs for which I don't know the rationale. After the node which 
originally received the update noticed that the other server is up, it 
waited 16 s before it started pushing the hints.

Here is the log:

  INFO [GossipStage:1] 2012-02-23 20:05:32,516 StorageService.java (line 
988) Node /192.0.2.1 state jump to normal
  INFO [HintedHandoff:1] 2012-02-23 20:05:49,766 
HintedHandOffManager.java (line 296) Started hinted handoff for token: 1 
with IP: /192.0.2.1
  INFO [HintedHandoff:1] 2012-02-23 20:05:50,048 ColumnFamilyStore.java 
(line 704) Enqueuing flush of 
Memtable-HintsColumnFamily@1352140719(205/1639 serialized/live bytes, 2 ops)
  INFO [FlushWriter:31] 2012-02-23 20:05:50,049 Memtable.java (line 246) 
Writing Memtable-HintsColumnFamily@1352140719(205/1639 serialized/live 
bytes, 2 ops)
  INFO [FlushWriter:31] 2012-02-23 20:05:50,192 Memtable.java (line 283) 
Completed flushing 
/media/data/cassandra/data/system/HintsColumnFamily-hc-10-Data.db (290 
bytes)
  INFO [CompactionExecutor:70] 2012-02-23 20:05:50,193 
CompactionTask.java (line 113) Compacting 
[SSTableReader(path='/media/data/cassandra/data/system/HintsColumnFamily-hc-10-Data.db'),

SSTableReader(path='/media/data/cassandra/data/system/HintsColumnFamily-hc-9-Data.db')]
  INFO [HintedHandoff:1] 2012-02-23 20:05:50,195 
HintedHandOffManager.java (line 373) Finished hinted handoff of 1 rows 
to endpoint /192.0.2.1


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