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From "Gesty, Jim" <>
Subject SEVERE:IOException occured when talking to server
Date Wed, 15 May 2013 14:24:04 GMT
We have a simple SolrCloud setup (4.1) running with a single shard and
multiple replicas across 3 servers, and it's working fine except once in a while,
the leader logs this error. We fine-tuned GC among other things and everything is lightning
fast. However, we still receive this SEVERE error a few times a day.

15-May-2013 08:38:36.701 SEVERE [tomcat-http--6] org.apache.solr.common.SolrException.log
shard update error StdNode:
IOException occured when talking to server at:
                at org.apache.solr.client.solrj.impl.HttpSolrServer.request(
                at org.apache.solr.client.solrj.impl.HttpSolrServer.request(
                at org.apache.solr.update.SolrCmdDistributor$
                at org.apache.solr.update.SolrCmdDistributor$
                at java.util.concurrent.FutureTask$Sync.innerRun(
                at java.util.concurrent.Executors$
                at java.util.concurrent.FutureTask$Sync.innerRun(
                at java.util.concurrent.ThreadPoolExecutor.runWorker(
                at java.util.concurrent.ThreadPoolExecutor$
Caused by: org.apache.http.NoHttpResponseException: The target server failed to respond
                at org.apache.http.impl.conn.DefaultResponseParser.parseHead(
                at org.apache.http.impl.AbstractHttpClientConnection.receiveResponseHeader(
                at org.apache.http.impl.conn.DefaultClientConnection.receiveResponseHeader(
                at org.apache.http.impl.conn.AbstractClientConnAdapter.receiveResponseHeader(
                at org.apache.http.protocol.HttpRequestExecutor.doReceiveResponse(
                at org.apache.http.protocol.HttpRequestExecutor.execute(
                at org.apache.http.impl.client.DefaultRequestDirector.tryExecute(
                at org.apache.http.impl.client.DefaultRequestDirector.execute(
                at org.apache.http.impl.client.AbstractHttpClient.execute(
                at org.apache.http.impl.client.AbstractHttpClient.execute(
                at org.apache.http.impl.client.AbstractHttpClient.execute(
                at org.apache.solr.client.solrj.impl.HttpSolrServer.request(
                ... 11 more

15-May-2013 08:38:36.706 INFO [tomcat-http--6] org.apache.solr.update.processor.DistributedUpdateProcessor.doFinish
try and ask to recover
15-May-2013 08:38:36.706 INFO [tomcat-http--6] org.apache.solr.client.solrj.impl.HttpClientUtil.createClient
Creating new http client, config:maxConnections=128&maxConnectionsPerHost

Any ideas on what the root cause of this issue may be and how we can remediate it?



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