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https://issues.apache.org/jira/browse/IGNITE-6394?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16167928#comment-16167928
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ASF GitHub Bot commented on IGNITE-6394:
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Github user ybabak closed the pull request at:
https://github.com/apache/ignite/pull/2671
> Can't create off-heap matrix with size over 2 Gb (int overflow in
> DenseOffHeapMatrixStorage.allocateMemory)
> -----------------------------------------------------------------------------------------------------------
>
> Key: IGNITE-6394
> URL: https://issues.apache.org/jira/browse/IGNITE-6394
> Project: Ignite
> Issue Type: Bug
> Components: ml
> Reporter: Oleg Ignatenko
> Assignee: Yury Babak
> Fix For: 2.3
>
>
> In order to reproduce, try to create off-heap matrix with size larger than
> 2Gb, eg like this:
> {code}new DenseLocalOffHeapMatrix(17_000, 17_000){code}
> Above fails:
> {noformat}
> java.lang.IllegalArgumentException: null
> at sun.misc.Unsafe.allocateMemory(Native Method)
> at
> org.apache.ignite.internal.util.GridUnsafe.allocateMemory(GridUnsafe.java:1068)
> at
> org.apache.ignite.ml.math.impls.storage.matrix.DenseOffHeapMatrixStorage.allocateMemory(DenseOffHeapMatrixStorage.java:219)
> ...
> {noformat}
> (you may need to allow Java get more than 2Gb off-heap memory for that with
> VM argument like {{-XX:MaxDirectMemorySize=1000g}})
> The reason for failure is that int arguments aren't converted to long prior
> to multiplying in {{DenseOffHeapMatrixStorage.allocateMemory}}:
> {code}ptr = GridUnsafe.allocateMemory(rows * cols * Double.BYTES);{code}
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