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https://issues.apache.org/bugzilla/show_bug.cgi?id=44059






------- Additional Comments From solprovidergmail.com
 2008-02-25 20:03 -------
A similar problem with Lenya-1.2 was crashing our production
server.  Server
typically runs less than 1% usage.  Pairs of java processes
appear using
(combined) 90% of one processor and only disappear when
Lenya is restarted.  The
server slows with 2 pairs and stalls with 3 pairs.  This
forced an upgrade last
August, a User ML post on 20071129 (no responses), and was
finally patched with
a cron job to restart Lenya when the symptoms appear.
Problem appears
intermittently with no identifiable cause.  jconsole is not
available for
troubleshooting Java 1.4.

Linux, Apache-httpd-2.1 as proxy, two processors
Java 1.4.2_08
Lenya 1.2.2, Cocoon 2.1.6
Lenya 1.2.5, Cocoon 2.1.10.  Upgrade from 1.2.2 to 1.2.5 did
not cure problem.

Could this be fixed by synchronizing all uses of HashMap in
the 1.2.x branch? 

Lenya-1.2.x references 127 HashMaps with 19
Collections.synchonizedMaps.
Cocoon-2.1.11 src/java references 313 HashMaps.  The
ubiquitous objectModel
declared in Cocoon-2.1's AbstractEnvironment is not
synchronized or
unmodifiable.  Is globally replacing "= new
HashMap();" with "=
Collections.synchronizedMap(new HashMap());" enough or
bad?  (A script would
also need to add "import java.util.Collections;"
where missing and needed.)

Is there a better solution?

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