[STORM-139] hashCode does not work for byte[]

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 0.10.0
• Component/s: storm-core
• Assignee: Derek Dagit
• Reporter: James Xu
• Created: 15/Dec/13 06:04
• Updated: 09/Oct/15 01:01
• Resolved: 22/Jul/15 23:48

Description

https://github.com/nathanmarz/storm/issues/245

Storm should use a different hashCode method when getting the hash for a byte[] array, since the default one uses the object identity. Should check the behavior on other arrays as well

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xiaokang: I tested byte[] and other arrays. The hashCode of array is the array object identity.

I alse tested that java.util.Arrays.hashCode(xx[]) is based of the array element's hash code. It maybe ok change the list-hash-code function of tuple.clj to fix the problem.

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Sirwellington: you may want to read this:
http://martin.kleppmann.com/2012/06/18/java-hashcode-unsafe-for-distributed-systems.html