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https://issues.apache.org/jira/browse/IVY-1197?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14483468#comment-14483468
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Loren Kratzke commented on IVY-1197:
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I would be happy to provide you with a project that will reproduce the issue. I
can and will do that.
Generally speaking from a high level, the utility classes are calling
convenience methods and writing to streams that ultimately buffer the data
being written. There is buffering, then more buffering, and even more buffering
until you have multiple copies of the entire content of the stream stored in
over sized buffers (because they double in size when they fill up). Oddly, the
twist is that the JVM hits a limit no matter how much RAM you allocate. Once
the buffers total more than about ~1GB (which is what happens with a 100-200MB
upload) the JVM refuses to allocate more buffer space (even is you jack up the
RAM to 20GB, no cigar). Honestly, there is no benefit in buffering any of this
data to begin with, it is just a side effect of using high level copy methods.
There is no memory ballooning at all when the content is written directly to
the network.
I will provide a test project and note the break points where you can debug and
watch the process walk all the way down the isle to an OOME. I will have this
for you asap.
> OutOfMemoryError during ivy:publish
> -----------------------------------
>
> Key: IVY-1197
> URL: https://issues.apache.org/jira/browse/IVY-1197
> Project: Ivy
> Issue Type: Bug
> Components: Core
> Affects Versions: 2.0
> Reporter: Michael Rumpf
> Attachments: ASF.LICENSE.NOT.GRANTED--clipboard.txt,
> org.apache.ivy.util.url.HttpClientHandler.patch
>
>
> When publishing a large file, an OutOfMemoryError occurs.
> {code}
> [ivy:publish] published ppg to
> XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
> BUILD FAILED
> /export/build/hudson/jobs/ppg-rcp/workspace/ppg-rcp/com.daimler.ppg.rcp.builder/build-wrapper.xml:152:
> The following error occurred while executing this line:
> /export/build/hudson/jobs/ppg-rcp/workspace/ppg-rcp/com.daimler.ppg.rcp.builder/build-wrapper.xml:277:
> java.lang.OutOfMemoryError: Java heap space
> at java.util.Arrays.copyOf(Arrays.java:2786)
> at java.io.ByteArrayOutputStream.write(ByteArrayOutputStream.java:94)
> at sun.net.www.http.PosterOutputStream.write(PosterOutputStream.java:61)
> at org.apache.ivy.util.FileUtil.copy(FileUtil.java:168)
> at
> org.apache.ivy.util.url.BasicURLHandler.upload(BasicURLHandler.java:200)
> at
> org.apache.ivy.util.url.URLHandlerDispatcher.upload(URLHandlerDispatcher.java:82)
> at org.apache.ivy.util.FileUtil.copy(FileUtil.java:140)
> at
> org.apache.ivy.plugins.repository.url.URLRepository.put(URLRepository.java:85)
> at
> org.apache.ivy.plugins.repository.AbstractRepository.put(AbstractRepository.java:130)
> at
> org.apache.ivy.plugins.resolver.RepositoryResolver.put(RepositoryResolver.java:219)
> at
> org.apache.ivy.plugins.resolver.RepositoryResolver.publish(RepositoryResolver.java:209)
> at
> org.apache.ivy.core.publish.PublishEngine.publish(PublishEngine.java:282)
> at
> org.apache.ivy.core.publish.PublishEngine.publish(PublishEngine.java:261)
> at
> org.apache.ivy.core.publish.PublishEngine.publish(PublishEngine.java:170)
> at org.apache.ivy.Ivy.publish(Ivy.java:600)
> at org.apache.ivy.ant.IvyPublish.doExecute(IvyPublish.java:299)
> at org.apache.ivy.ant.IvyTask.execute(IvyTask.java:277)
> at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291)
> at sun.reflect.GeneratedMethodAccessor101.invoke(Unknown Source)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at
> org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
> at org.apache.tools.ant.Task.perform(Task.java:348)
> at org.apache.tools.ant.Target.execute(Target.java:390)
> at org.apache.tools.ant.Target.performTasks(Target.java:411)
> at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1397)
> at
> org.apache.tools.ant.helper.SingleCheckExecutor.executeTargets(SingleCheckExecutor.java:38)
> at org.apache.tools.ant.Project.executeTargets(Project.java:1249)
> at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:442)
> at org.apache.tools.ant.taskdefs.CallTarget.execute(CallTarget.java:105)
> at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> Total time: 14 minutes 24 seconds
> Finished: FAILURE
> {code}
> The size of the file that is being uploaded is: 687712714, so around
> 650-700MB.
> The publish task is part of a Hudson Ant build where the artefacts are
> published to an Artifactory repository at the end.
> I have given the Job 1300MB for the max heap size.
> It seems as if the whole file is loaded into memory for the upload.
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