Parser hangs and consumes >90% CPU

Name: krC82822 Date: 08/09/2001


java version "1.3.0" (with JAXP 1.1)
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.0-C)
Java HotSpot(TM) Client VM (build 1.3.0-C, mixed mode)
and
java version "1.4.0-beta" (with its built-in XML-related classes) [per user, via email]
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta-b65)
Java HotSpot(TM) Client VM (build 1.4.0-beta-b65, mixed mode)
and
java version "1.4.0-beta_refresh" [here at Sun]
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta_refresh-b74)
Java HotSpot(TM) Client VM (build 1.4.0-beta_refresh-b74, mixed mode)
-------------

When the XML parser tries to parse a particular XML file against our DTD file,
it hangs and consumes >90% of the CPU. If I add one space character in a
particular location in the file, it works fine. The problem occurs no matter
whether I use SAX or DOM parsing.

------

9 Aug 2001, eval1127@eng -- received test case from user.

The location is in question is just before a new (opening) <table ...
tag. Putting the space in front of it lets the parsing complete OK.
Removing it causes parsing to hang, and continue to chew CPU time.

Testing with build 74 of merlin:
java version "1.4.0-beta_refresh"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta_refresh-b74)
Java HotSpot(TM) Client VM (build 1.4.0-beta_refresh-b74, mixed mode)

% jar xvf XML*zip
extracted: Echo.java
extracted: Echo.class
extracted: not_work.XML
extracted: work.XML
extracted: quote.dtd

% diff work.XML not_work.XML
182c182
< <table id="Table" width="650" cellpadding ="7" cellspacing ="0">
---
> <table id="Table" width="650" cellpadding ="7" cellspacing ="0">

[difference is that the "working" one has a leading space at beginning of line]

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(Review ID: 129325)
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