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https://issues.apache.org/jira/browse/XERCESJ-1683?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16932037#comment-16932037
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Mukul Gandhi commented on XERCESJ-1683:
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The SymbolHash.get(...) method is referred at 60-70 places in Xerces codebase.
I feel that, it won't be good to have an error handling for
java.lang.ArithmeticException within the SymbolHash.get(...) method (since that
would be at a very granular level).
Also, as stated in the bug report, that its a NPE (i.e NullPointerException).
Should'nt that be ArithmeticException?
As of now, it looks difficult to reproduce the bug shared, to attempt a fix. A
sample by bug reporter, helping us test and attempt a fix would be useful.
> NullPointerException in SymbolHash.get
> --------------------------------------
>
> Key: XERCESJ-1683
> URL: https://issues.apache.org/jira/browse/XERCESJ-1683
> Project: Xerces2-J
> Issue Type: Bug
> Components: SAX
> Reporter: Radu Coravu
> Priority: Major
>
> We use as XSModelImpl to iterate XML Schema components.
> One of our clients, on a schema that they did not provide obtained this NPE:
> {code}[ AWT-EventQueue-0 ] - java.lang.ArithmeticException: / by zero
> java.lang.ArithmeticException: / by zero
> at org.apache.xerces.util.SymbolHash.get(Unknown Source)
> at org.apache.xerces.impl.xs.XSModelImpl.getSubstitutionGroup(Unknown
> Source) {code}
> The NPE seams feasible if a SymbolHash with zero length is constructed and
> then queried for a value. Maybe this could be taken into account on your side.
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