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https://issues.apache.org/jira/browse/IGNITE-4145?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15653626#comment-15653626
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Sergi Vladykin commented on IGNITE-4145:
----------------------------------------
You can add it to the same place where we have other multithreaded query tests,
take a look at `IgniteCacheQueryMultiThreadedSelfTest` for example.
> "No query result found for request" exception when running multiple queries
> concurrently.
> -----------------------------------------------------------------------------------------
>
> Key: IGNITE-4145
> URL: https://issues.apache.org/jira/browse/IGNITE-4145
> Project: Ignite
> Issue Type: Bug
> Components: SQL
> Affects Versions: 1.7
> Reporter: Vladimir Ozerov
> Assignee: Andrew Mashenkov
> Fix For: 1.8
>
>
> When many queries are executed simultaneously in multi-node cluster, the
> following exception might appear from time to time:
> {code}
> Exception in thread "qry-exec-20" javax.cache.CacheException: Failed to fetch
> data from node: 3432842f-2fa2-44b9-b69b-cadba286d317
> at
> org.apache.ignite.internal.processors.query.h2.twostep.GridReduceQueryExecutor$3.fetchNextPage(GridReduceQueryExecutor.java:298)
> at
> org.apache.ignite.internal.processors.query.h2.twostep.GridMergeIndex.fetchNextPage(GridMergeIndex.java:229)
> at
> org.apache.ignite.internal.processors.query.h2.twostep.GridMergeIndexUnsorted$1.hasNext(GridMergeIndexUnsorted.java:106)
> at
> org.apache.ignite.internal.processors.query.h2.twostep.GridMergeIndex$IteratorCursor.next(GridMergeIndex.java:351)
> at
> org.apache.ignite.internal.processors.query.h2.twostep.GridMergeIndex$FetchingCursor.next(GridMergeIndex.java:382)
> at
> org.apache.ignite.internal.processors.query.h2.twostep.GridReduceQueryExecutor.query(GridReduceQueryExecutor.java:640)
> at
> org.apache.ignite.internal.processors.query.h2.IgniteH2Indexing$4.iterator(IgniteH2Indexing.java:1057)
> at
> org.apache.ignite.internal.processors.cache.QueryCursorImpl.iterator(QueryCursorImpl.java:81)
> at
> org.apache.ignite.yardstick.ringcentral.AdgRunner$QueryExecutor.run(AdgRunner.java:394)
> at java.lang.Thread.run(Thread.java:745)
> Suppressed: javax.cache.CacheException: Failed to execute map query on
> the node: c51bc4f2-7038-4df6-88a9-eb87506c2f86, class
> javax.cache.CacheException:No query result found for request:
> GridQueryNextPageRequest [qryReqId=93, qry=0, pageSize=1024]
> at
> org.apache.ignite.internal.processors.query.h2.twostep.GridReduceQueryExecutor.fail(GridReduceQueryExecutor.java:259)
> at
> org.apache.ignite.internal.processors.query.h2.twostep.GridReduceQueryExecutor.onFail(GridReduceQueryExecutor.java:249)
> at
> org.apache.ignite.internal.processors.query.h2.twostep.GridReduceQueryExecutor.onMessage(GridReduceQueryExecutor.java:230)
> at
> org.apache.ignite.internal.processors.query.h2.twostep.GridReduceQueryExecutor$1.onMessage(GridReduceQueryExecutor.java:178)
> at
> org.apache.ignite.internal.managers.communication.GridIoManager$ArrayListener.onMessage(GridIoManager.java:1900)
> at
> org.apache.ignite.internal.managers.communication.GridIoManager.invokeListener(GridIoManager.java:1080)
> at
> org.apache.ignite.internal.managers.communication.GridIoManager.processRegularMessage0(GridIoManager.java:708)
> at
> org.apache.ignite.internal.managers.communication.GridIoManager.access$1700(GridIoManager.java:101)
> at
> org.apache.ignite.internal.managers.communication.GridIoManager$5.run(GridIoManager.java:671)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> ... 1 more
> {code}
> Quick analysis shows that next-page request could possibly arrive before
> original query message is processed. Need to confirm it with deeper debugging
> first.
> The best way to reproduce it:
> 1) Generate some data
> 2) Start several data nodes (e.g. 4)
> 3) Start client node
> 4) Concurrently execute multiple SQL queries from the client in different
> threads.
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