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https://issues.apache.org/jira/browse/CASSANDRA-2514?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13022248#comment-13022248
]
Jonathan Ellis commented on CASSANDRA-2514:
-------------------------------------------
That's the point, hintedEndpoints is *usually* but not always a subset of
writeEndpoints. Here is the code from getHintedEndpoints:
{code}
// assign dead endpoints to be hinted to the closest live one, or to
the local node
// (since it is trivially the closest) if none are alive. This way,
the cost of doing
// a hint is only adding the hint header, rather than doing a full
extra write, if any
// destination nodes are alive.
//
// we do a 2nd pass on targets instead of using temporary storage,
// to optimize for the common case (everything was alive).
InetAddress localAddress = FBUtilities.getLocalAddress();
for (InetAddress ep : targets)
{
if (map.containsKey(ep))
continue;
if (!StorageProxy.shouldHint(ep))
{
if (logger.isDebugEnabled())
logger.debug("not hinting " + ep + " which has been down "
+ Gossiper.instance.getEndpointDowntime(ep) + "ms");
continue;
}
InetAddress destination = map.isEmpty()
? localAddress
:
snitch.getSortedListByProximity(localAddress, map.keySet()).get(0);
map.put(destination, ep);
}
{code}
> batch_mutate operations with CL=LOCAL_QUORUM throw TimeOutException when
> there aren't sufficient live nodes
> -----------------------------------------------------------------------------------------------------------
>
> Key: CASSANDRA-2514
> URL: https://issues.apache.org/jira/browse/CASSANDRA-2514
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Affects Versions: 0.7.0
> Environment: 1. Cassandra 0.7.4 running on RHEL 5.5
> 2. 2 DC setup
> 3. RF = 4 (DC1 = 2, DC2 = 2)
> 4. CL = LOCAL_QUORUM
> Reporter: Narendra Sharma
> Priority: Minor
> Fix For: 0.7.5
>
> Attachments: 2514-v2.txt, CASSANDRA-2514.patch
>
>
> We have a 2 DC setup with RF = 4. There are 2 nodes in each DC. Following is
> the keyspace definition:
> <snip>
> keyspaces:
> - name: KeyspaceMetadata
> replica_placement_strategy:
> org.apache.cassandra.locator.NetworkTopologyStrategy
> strategy_options:
> DC1 : 2
> DC2 : 2
> replication_factor: 4
> </snip>
> I shutdown all except one node and waited for the live node to recognize that
> other nodes are dead. Following is the nodetool ring output on the live node:
> Address Status State Load Owns Token
>
>
> 169579575332184635438912517119426957796
> 10.17.221.19 Down Normal ? 29.20%
> 49117425183422571410176530597442406739
> 10.17.221.17 Up Normal 81.64 KB 4.41%
> 56615248844645582918169246064691229930
> 10.16.80.54 Down Normal ? 21.13%
> 92563519227261352488017033924602789201
> 10.17.221.18 Down Normal ? 45.27%
> 169579575332184635438912517119426957796
> I expect UnavailableException when I send batch_mutate request to node that
> is up. However, it returned TimeOutException:
> TimedOutException()
> at
> org.apache.cassandra.thrift.Cassandra$batch_mutate_result.read(Cassandra.java:16493)
> at
> org.apache.cassandra.thrift.Cassandra$Client.recv_batch_mutate(Cassandra.java:916)
> at
> org.apache.cassandra.thrift.Cassandra$Client.batch_mutate(Cassandra.java:890)
> Following is the cassandra-topology.properties
> # Cassandra Node IP=Data Center:Rack
> 10.17.221.17=DC1:RAC1
> 10.17.221.19=DC1:RAC2
> 10.17.221.18=DC2:RAC1
> 10.16.80.54=DC2:RAC2
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