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https://issues.apache.org/jira/browse/HTTPCORE-513?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Oleg Kalnichevski resolved HTTPCORE-513.
----------------------------------------
Resolution: Fixed
Fix Version/s: 4.4.10
Fixed in 4.4.x and master.
Oleg
> ExpandableBuffer breaks on large response
> -----------------------------------------
>
> Key: HTTPCORE-513
> URL: https://issues.apache.org/jira/browse/HTTPCORE-513
> Project: HttpComponents HttpCore
> Issue Type: Bug
> Components: HttpCore, HttpCore NIO
> Affects Versions: 4.4.9
> Reporter: Ion Moldovan
> Priority: Critical
> Fix For: 4.4.10, 5.0
>
>
> Steps:
> # create a PHP page with the following content:
> ## <?php
> $response='abc';
> echo str_pad($response, 2147483647);
> # send a request using jMeter to the said page
> Expected result: the request is received
> Actual result: the VM fails with:
> java.lang.OutOfMemoryError: Requested array size exceeds VM limit
> Dumping heap to java_pid20344.hprof ...
> Heap dump file created [3275879706 bytes in 7.490 secs]
> Uncaught Exception java.lang.OutOfMemoryError: Requested array size exceeds
> VM limit. See log file for details.
>
> Proposed solution:
> * rewrite org.apache.http.nio.util.ExpandableBuffer.expand() to:
>
> {code:java}
> /**
> * Expands buffer's capacity.
> */
> protected void expand() {
> int newcapacity = (this.buffer.capacity() + 1) << 1;
> if (newcapacity < 0) {
> int headRoom = Integer.max(Long.BYTES, 8);
> // Reason: In GC the size of objects is passed as int (2 bytes).
> // Then, the header size of the objects is added to the size.
> // Long has the longest header available. Object header seems to be
> linked to it.
> // Details: I added a minimum of 8 just to be safe and because 8 is used
> in
> // java.lang.Object.ArrayList: private static final int MAX_ARRAY_SIZE =
> 2147483639.
> newcapacity = Integer.MAX_VALUE - headRoom;
> }
> expandCapacity(newcapacity);
> }{code}
>
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