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https://issues.apache.org/jira/browse/ARIES-2195?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18042737#comment-18042737
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Timothy James Ward commented on ARIES-2195:
-------------------------------------------
https://github.com/apache/aries-typedevent/pull/28
> OutOfMemoryError when configure history storage with open range policy
> ----------------------------------------------------------------------
>
> Key: ARIES-2195
> URL: https://issues.apache.org/jira/browse/ARIES-2195
> Project: Aries
> Issue Type: Bug
> Components: Typed Event
> Affects Versions: typedevent-0.0.2
> Environment: Test to reproduce the error:
> {code:java}
> package org.apache.aries.typedevent.bus.impl;
> import java.util.Collections;
> import org.junit.jupiter.api.Test;
> import org.osgi.service.typedevent.monitor.RangePolicy;
> class TypedEventMonitorImplTest {
> @Test
> void testConfigureHistoryStorage() {
> TypedEventMonitorImpl monitor = new
> TypedEventMonitorImpl(Collections.emptyMap());
> monitor.configureHistoryStorage("a/b/c",
> RangePolicy.unlimited());
> monitor.configureHistoryStorage("a/b/c",
> RangePolicy.atLeast(0));
> monitor.configureHistoryStorage("a/b/c",
> RangePolicy.range(0,Integer.MAX_VALUE));
> monitor.configureHistoryStorage("a/b/c",
> RangePolicy.atLeast(10));
> // fails: monitor.configureHistoryStorage("a/b/c",
> RangePolicy.range(1,Integer.MAX_VALUE));
> }
> }
> {code}
>
> Reporter: Guido Grune
> Priority: Major
>
> Configuring the history storage on the TypedEventMonitorImpl with a
> RangePolice that has an minimum > 0 and without maximum (Integer.MAX_VALUE)
> results in an OutOfMemoryError as he tries to create an array with
> Integer.MAX_VALUE size.
> {code:java}
> java.lang.OutOfMemoryError: Requested array size exceeds VM limit
> at java.base/java.util.ArrayDeque.<init>(ArrayDeque.java:194)
> at
> org.apache.aries.typedevent.bus.impl.TopicHistory.<init>(TopicHistory.java:37)
> at
> org.apache.aries.typedevent.bus.impl.TypedEventMonitorImpl.updateRestrictedHistory(TypedEventMonitorImpl.java:373)
> at
> org.apache.aries.typedevent.bus.impl.TypedEventMonitorImpl.configureHistoryStorage(TypedEventMonitorImpl.java:362)
> at
> org.apache.aries.typedevent.bus.impl.TypedEventMonitorImplTest.testConfigureHistoryStorage(TypedEventMonitorImplTest.java:36){code}
> Some discussions about the array with Interger.MAX_VALUE topic:
> [https://stackoverflow.com/questions/3038392/do-java-arrays-have-a-maximum-size]
> [https://stackoverflow.com/questions/31382531/why-i-cant-create-an-array-with-large-size]
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