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https://issues.apache.org/jira/browse/STORM-1481?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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P. Taylor Goetz updated STORM-1481:
-----------------------------------
Fix Version/s: 0.10.1
> avoid Math.abs(Integer) get a negative value
> --------------------------------------------
>
> Key: STORM-1481
> URL: https://issues.apache.org/jira/browse/STORM-1481
> Project: Apache Storm
> Issue Type: Bug
> Components: storm-core
> Reporter: Xin Wang
> Assignee: Xin Wang
> Fix For: 1.0.0, 0.10.1, 2.0.0
>
>
> before fix:
> {code:title=org.apache.storm.trident.partition.IndexHashGrouping}
> public static int objectToIndex(Object val, int numPartitions) {
> if(val==null) return 0;
> else {
> return Math.abs(val.hashCode()) % numPartitions;
> }
> }
> {code}
> If the hashcode is Integer.MIN_VALUE, then the result will be negative as
> well (since Math.abs(Integer.MIN_VALUE) == Integer.MIN_VALUE).
> after fix:
> Use toPositive replace Math.abs:
> {code}
> public static int toPositive(int number) {
> return number & Integer.MAX_VALUE;
> }
> {code}
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