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From Jonathan Ellis <jbel...@gmail.com>
Subject Re: hinted handoff 16 s delay
Date Fri, 24 Feb 2012 22:40:50 GMT
Right.

See also https://issues.apache.org/jira/browse/CASSANDRA-3958.

On Thu, Feb 23, 2012 at 5:43 PM, Todd Burruss <bburruss@expedia.com> wrote:
> if I remember correctly, cassandra has a random delay in it so hint
> deliver is staggered and does not overwhelm the just restarted node.
>
> On 2/23/12 1:46 PM, "Hontvári József Levente" <hontvari@flyordie.com>
> wrote:
>
>>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-h
>>c-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
>>
>



-- 
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com

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