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https://issues.apache.org/jira/browse/SPARK-4805?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Aaron Davidson resolved SPARK-4805.
-----------------------------------
Resolution: Fixed
Assignee: Sean Owen
> BlockTransferMessage.toByteArray() trips assertion
> --------------------------------------------------
>
> Key: SPARK-4805
> URL: https://issues.apache.org/jira/browse/SPARK-4805
> Project: Spark
> Issue Type: Bug
> Components: Shuffle
> Affects Versions: 1.1.0
> Reporter: Sean Owen
> Assignee: Sean Owen
>
> The {{ByteBuf}} below is allocated to have enough room to encode just the
> message, but a type byte is written too. The buffer resizes and is left with
> capacity, which is a minor waste. But when assertions are on, it fails the
> assertion below. This is triggered by unit tests, but the Java test for this
> wasn't running. You can verify that a simple "+1" in the allocated size fixes
> it.
> {code}
> public byte[] toByteArray() {
> ByteBuf buf = Unpooled.buffer(encodedLength());
> buf.writeByte(type().id);
> encode(buf);
> assert buf.writableBytes() == 0 : "Writable bytes remain: " +
> buf.writableBytes();
> return buf.array();
> }
> {code}
> [~ilikerps]
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