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https://issues.apache.org/jira/browse/CASSANDRA-10688?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15087944#comment-15087944
]
Ariel Weisberg commented on CASSANDRA-10688:
--------------------------------------------
That's not what I am seeing when I run this test case? Am I missing something?
{code}
@Test
public void testArray()
{
int entryCount = 5000000;
final Object objects[] = new Object[entryCount];
for (int i = 0; i < entryCount; i++)
objects[i] = new Object();
RefCounted.Tidy tidier = new RefCounted.Tidy() {
Object ref = objects;
@Override
public void tidy() throws Exception
{
}
@Override
public String name()
{
return "42";
}
};
Ref<Object> ref = new Ref(new AtomicReference<Object[]>(objects),
tidier);
Ref.Visitor visitor = new Ref.Visitor();
visitor.run();
ref.close();
System.out.println(visitor.lastVisitedCount);
System.out.println(visitor.iterations);
Assert.assertTrue(visitor.lastVisitedCount > entryCount &&
visitor.lastVisitedCount < entryCount + 10);
Assert.assertTrue(visitor.iterations > entryCount && visitor.iterations
< entryCount + 10);
}
{code}
I have visitor save the count of the visited set as well as the number of
iterations. It should be quite large since it has to walk all the objects in
the array, but it's skipping the array elements.
> Stack overflow from SSTableReader$InstanceTidier.runOnClose in Leak Detector
> ----------------------------------------------------------------------------
>
> Key: CASSANDRA-10688
> URL: https://issues.apache.org/jira/browse/CASSANDRA-10688
> Project: Cassandra
> Issue Type: Bug
> Components: Local Write-Read Paths, Testing
> Reporter: Jeremiah Jordan
> Assignee: Ariel Weisberg
> Fix For: 3.0.x
>
>
> Running some tests against cassandra-3.0
> 9fc957cf3097e54ccd72e51b2d0650dc3e83eae0
> The tests are just running cassandra-stress write and read while adding and
> removing nodes from the cluster. After the test runs when I go back through
> logs I find the following Stackoverflow fairly often:
> ERROR [Strong-Reference-Leak-Detector:1] 2015-11-11 00:04:10,638
> Ref.java:413 - Stackoverflow [private java.lang.Runnable
> org.apache.cassandra.io.sstable.format.SSTableReader$InstanceTidier.runOnClose,
> final java.lang.Runnable
> org.apache.cassandra.io.sstable.format.SSTableReader$DropPageCache.andThen,
> final org.apache.cassandra.cache.InstrumentingCache
> org.apache.cassandra.io.sstable.SSTableRewriter$InvalidateKeys.cache, private
> final org.apache.cassandra.cache.ICache
> org.apache.cassandra.cache.InstrumentingCache.map, private final
> com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap
> org.apache.cassandra.cache.ConcurrentLinkedHashCache.map, final
> com.googlecode.concurrentlinkedhashmap.LinkedDeque
> com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap.evictionDeque,
> com.googlecode.concurrentlinkedhashmap.Linked
> com.googlecode.concurrentlinkedhashmap.LinkedDeque.first,
> com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap$Node
> com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap$Node.next,
> com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap$Node
> com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap$Node.next,
> com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap$Node
> com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap$Node.next,
> com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap$Node
> com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap$Node.next,
> com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap$Node
> com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap$Node.next,
> com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap$Node
> com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap$Node.next,
> com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap$Node
> com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap$Node.next,
> com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap$Node
> com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap$Node.next,
> com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap$Node
> com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap$Node.next,
> com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap$Node
> ....... (repeated a whole bunch more) ....
> com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap$Node
> com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap$Node.next,
> com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap$Node
> com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap$Node.next,
> com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap$Node
> com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap$Node.next,
> com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap$Node
> com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap$Node.next,
> com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap$Node
> com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap$Node.next,
> final java.lang.Object
> com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap$Node.key,
> public final byte[] org.apache.cassandra.cache.KeyCacheKey.key
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