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https://issues.apache.org/jira/browse/CALCITE-2512?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16597568#comment-16597568
]
Sergey Nuyanzin commented on CALCITE-2512:
------------------------------------------
Thank you for pointing to {{ArrayList$Itr}}
But if the the issue is in it do you mind of its elimination and replacing it
with array (I see here only RO access) e.g.
{code}
public static final Supplier<Object[]> ROW_GENERATOR =
new Supplier<Object[]>() {
private int counter = 0;
private final String[] items = new String[]{"paint", "paper", "brush"};
@Override public Object[] get() {
final int index = counter++;
return new Object[]{
System.currentTimeMillis(), index, items[index % items.length],
10};
}
};
{code}
> StreamTest#testStreamCancel fails in a flaky way
> ------------------------------------------------
>
> Key: CALCITE-2512
> URL: https://issues.apache.org/jira/browse/CALCITE-2512
> Project: Calcite
> Issue Type: Bug
> Reporter: Sergey Nuyanzin
> Assignee: Julian Hyde
> Priority: Major
>
> It fails only once while local build {{mvn clean install}}
> the trace is below
> it leads to the code
> {code}
> public static final Function0<Object[]> ROW_GENERATOR =
> new Function0<Object[]>() {
> private int counter = 0;
> private Iterator<String> items =
> Iterables.cycle("paint", "paper", "brush").iterator();
> @Override public Object[] apply() {
> return new Object[]{System.currentTimeMillis(), counter++,
> items.next(), 10};
> }
> };
> {code}
> Unfortunately could not reproduce it again. The only thing that I have in
> mind: could it happen that items was not initialized before {{items.next()}}
> call in {{apply()}}. May be it makes sense to have {{items}} as {{final}}
> {noformat}
> [INFO] Tests run: 16, Failures: 0, Errors: 0, Skipped: 0, Time elapsed:
> 21.694 s - in org.apache.calcite.test.CoreQuidemTest
> [INFO] Running org.apache.calcite.test.StreamTest
> java.util.NoSuchElementException
> at java.util.ArrayList$Itr.next(ArrayList.java:862)
> at com.google.common.collect.Iterators$4.next(Iterators.java:422)
> at org.apache.calcite.test.StreamTest$1.apply(StreamTest.java:460)
> at org.apache.calcite.test.StreamTest$1.apply(StreamTest.java:454)
> at
> org.apache.calcite.test.StreamTest$InfiniteOrdersTable$1.next(StreamTest.java:476)
> at
> org.apache.calcite.test.StreamTest$InfiniteOrdersTable$1.next(StreamTest.java:470)
> at
> org.apache.calcite.linq4j.Linq4j$IterableEnumerator.moveNext(Linq4j.java:463)
> at
> org.apache.calcite.linq4j.EnumerableDefaults$11$1.moveNext(EnumerableDefaults.java:1875)
> at
> org.apache.calcite.linq4j.EnumerableDefaults$11$1.moveNext(EnumerableDefaults.java:1875)
> at
> org.apache.calcite.linq4j.TransformedEnumerator.moveNext(TransformedEnumerator.java:35)
> at
> org.apache.calcite.linq4j.Linq4j$EnumeratorIterator.next(Linq4j.java:685)
> at
> org.apache.calcite.avatica.util.IteratorCursor.next(IteratorCursor.java:46)
> at
> org.apache.calcite.avatica.AvaticaResultSet.next(AvaticaResultSet.java:217)
> at
> org.apache.calcite.test.StreamTest.lambda$testStreamCancel$1(StreamTest.java:251)
> at
> org.apache.calcite.test.CalciteAssert.assertQuery(CalciteAssert.java:552)
> at
> org.apache.calcite.test.CalciteAssert$AssertQuery.returns(CalciteAssert.java:1328)
> at
> org.apache.calcite.test.CalciteAssert$AssertQuery.returns(CalciteAssert.java:1305)
> at
> org.apache.calcite.test.StreamTest.testStreamCancel(StreamTest.java:248)
> 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
> org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
> at
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
> at
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
> at
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
> at
> org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:298)
> at
> org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:292)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> at java.lang.Thread.run(Thread.java:748)
> [ERROR] Tests run: 9, Failures: 0, Errors: 1, Skipped: 2, Time elapsed: 0.33
> s <<< FAILURE! - in org.apache.calcite.test.StreamTest
> [ERROR] testStreamCancel(org.apache.calcite.test.StreamTest) Time elapsed:
> 0.14 s <<< ERROR!
> java.lang.RuntimeException: exception while executing [select stream * from
> orders]
> at
> org.apache.calcite.test.StreamTest.testStreamCancel(StreamTest.java:248)
> Caused by: java.util.NoSuchElementException
> at
> org.apache.calcite.test.StreamTest.lambda$testStreamCancel$1(StreamTest.java:251)
> at
> org.apache.calcite.test.StreamTest.testStreamCancel(StreamTest.java:248)
> {noformat}
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