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https://issues.apache.org/jira/browse/SOLR-1395?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12919581#action_12919581
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tom liu commented on SOLR-1395:
-------------------------------
My deployment is:
# one Master
# two Slaves:
#* solr01
#* solr02
# two Indexes:
#* solrhome01(.zip)
#* solrhome02(.zip)
And, i use:
{noformat}
# bin/katta addIndex solrhome01 hdfs://localhost:9000/solr/solrhome01.zip
# bin/katta addIndex solrhome02 hdfs://localhost:9000/solr/solrhome02.zip
{noformat}
so, my shard-Node is:
# solrhome01#solrhome01
#* --solr01
#* --solr02
# solrhome02#solrhome02
#* --solr01
#* --solr02
When i searched in master, i found that, in any slave, the search ran twice,
such as:
{noformat}
SolrServer.request: solr01:20000 shards:[solrhome01#solrhome01,
solrhome02#solrhome02]
request
params:fl=id%2Cscore&start=0&q=solr&isShard=true&fsv=true&rows=10&shards=solrhome01%23solrhome01%2Csolrhome02%23solrhome02
2010-10-10 16:17:04 org.apache.solr.core.SolrCore execute
信息: [solrhome02#solrhome02] webapp=null path=/select
params={fl=id%2Cscore&start=0&q=solr&isShard=true&fsv=true&rows=10} hits=1
status=0 QTime=16
2010-10-10 16:17:04 org.apache.solr.core.SolrCore execute
信息: [solrhome01#solrhome01] webapp=null path=/select
params={fl=id%2Cscore&start=0&q=solr&isShard=true&fsv=true&rows=10} hits=1
status=0 QTime=16
2010-10-10 16:17:04 org.apache.solr.core.SolrCore execute
信息: [solrhome02#solrhome02] webapp=null path=/select
params={fl=id%2Cscore%2Cid&start=0&q=solr&isShard=true&rows=10&ids=SOLR1000}
status=0 QTime=0
SolrServer.SolrResponse:{response={numFound=1,start=00.5747526,docs=[SolrDocument[{id=SOLR1000,
score=0.5747526}]]},QueriedShards=[Ljava.lang.String;@175ace6}
{noformat}
{noformat}
SolrServer.request: tom-SL510:20001 shards:[solrhome01#solrhome01,
solrhome02#solrhome02]
request
params:start=0&ids=SOLR1000&q=solr&isShard=true&rows=10&shards=solrhome01%23solrhome01%2Csolrhome02%23solrhome02
2010-10-10 16:17:04 org.apache.solr.core.SolrCore execute
信息: [solrhome02#solrhome02] webapp=null path=/select
params={start=0&ids=SOLR1000&q=solr&isShard=true&rows=10&fsv=true&fl=id%2Cscore}
status=0 QTime=16
2010-10-10 16:17:04 org.apache.solr.core.SolrCore execute
信息: [solrhome01#solrhome01] webapp=null path=/select
params={start=0&ids=SOLR1000&q=solr&isShard=true&rows=10&fsv=true&fl=id%2Cscore}
status=0 QTime=16
2010-10-10 16:17:04 org.apache.solr.core.SolrCore execute
信息: [solrhome01#solrhome01] webapp=null path=/select
params={start=0&ids=SOLR1000&ids=SOLR1000&q=solr&isShard=true&rows=10} status=0
QTime=0
SolrServer.SolrResponse:{response={numFound=1,start=0,docs=[SolrDocument[{id=SOLR1000,
...]]},QueriedShards=[Ljava.lang.String;@1d590d}
{noformat}
i think, in slaves, IS_SHARD=true, so, it would prevent this happens.
> Integrate Katta
> ---------------
>
> Key: SOLR-1395
> URL: https://issues.apache.org/jira/browse/SOLR-1395
> Project: Solr
> Issue Type: New Feature
> Affects Versions: 1.4
> Reporter: Jason Rutherglen
> Priority: Minor
> Fix For: Next
>
> Attachments: back-end.log, front-end.log, hadoop-core-0.19.0.jar,
> katta-core-0.6-dev.jar, katta.node.properties, katta.zk.properties,
> log4j-1.2.13.jar, solr-1395-1431-3.patch, solr-1395-1431-4.patch,
> solr-1395-1431-katta0.6.patch, solr-1395-1431-katta0.6.patch,
> solr-1395-1431.patch, SOLR-1395.patch, SOLR-1395.patch, SOLR-1395.patch,
> test-katta-core-0.6-dev.jar, zkclient-0.1-dev.jar, zookeeper-3.2.1.jar
>
> Original Estimate: 336h
> Remaining Estimate: 336h
>
> We'll integrate Katta into Solr so that:
> * Distributed search uses Hadoop RPC
> * Shard/SolrCore distribution and management
> * Zookeeper based failover
> * Indexes may be built using Hadoop
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