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https://issues.apache.org/jira/browse/IGNITE-7483?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vyacheslav Koptilin reassigned IGNITE-7483:
-------------------------------------------
Assignee: Vyacheslav Koptilin
> Queries: transformers are not executed when paging the result
> -------------------------------------------------------------
>
> Key: IGNITE-7483
> URL: https://issues.apache.org/jira/browse/IGNITE-7483
> Project: Ignite
> Issue Type: Bug
> Components: cache
> Affects Versions: 2.3
> Reporter: Sascha Hofer
> Assignee: Vyacheslav Koptilin
> Priority: Major
>
> It seems that transformers are not executed during pagination which leads to
> {{ClassCastExceptions}} because the result list also contains instances of
> {{GridCacheQueryResponseEntry}}.
> To reproduce open {{GridCacheQueryTransformerSelfTest.testGetKeys()}} and set
> a page size of 1 so that
> {code:java}
> List<Integer> keys = cache.query(new ScanQuery<Integer, String>(),
> transformer).getAll();
> {code}
> becomes to
> {code:java}
> List<Integer> keys = cache.query(new ScanQuery<Integer,
> String>().setPageSize(1), transformer).getAll();
> {code}
> this leads to following stack trace:
> {noformat}
> java.lang.ClassCastException:
> org.apache.ignite.internal.processors.cache.query.GridCacheQueryResponseEntry
> cannot be cast to java.lang.Comparable
> at java.util.ComparableTimSort.binarySort(ComparableTimSort.java:249)
> at java.util.ComparableTimSort.sort(ComparableTimSort.java:207)
> at java.util.Arrays.sort(Arrays.java:1312)
> at java.util.Arrays.sort(Arrays.java:1506)
> at java.util.ArrayList.sort(ArrayList.java:1454)
> at java.util.Collections.sort(Collections.java:141)
> at
> org.apache.ignite.internal.processors.cache.query.GridCacheQueryTransformerSelfTest.testGetKeys(GridCacheQueryTransformerSelfTest.java:102)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at junit.framework.TestCase.runTest(TestCase.java:176)
> at
> org.apache.ignite.testframework.junits.GridAbstractTest.runTestInternal(GridAbstractTest.java:2001)
> at
> org.apache.ignite.testframework.junits.GridAbstractTest.access$000(GridAbstractTest.java:133)
> at
> org.apache.ignite.testframework.junits.GridAbstractTest$5.run(GridAbstractTest.java:1916)
> at java.lang.Thread.run(Thread.java:745)
> {noformat}
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