NullPointerException: defaultAuxValues in CompositeCacheManager
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Key: JCS-79
URL: https://issues.apache.org/jira/browse/JCS-79
Project: JCS
Issue Type: Bug
Components: Composite Cache
Affects Versions: jcs-1.3
Environment: java version "1.6.0_20"
Java(TM) SE Runtime Environment (build 1.6.0_20-b02-279-9M3165)
Java HotSpot(TM) 64-Bit Server VM (build 16.3-b01-279, mixed mode)
Reporter: Graham Leggett
Assignee: Aaron Smuts
When an attempt is made to use torque's JCS support, JCS crashes on
initialisation with a NullPointerException as below.
The cause is that CompositeCacheConfiguration.parseRegion is passed a parameter
called "value", and this value is not guarded against being null. The failure
happens on this line:
StringTokenizer st = new StringTokenizer( value, "," );
If value is a required string, a proper error message explaining exactly what
the problem is, and exactly what the end user must do to fix it should be
thrown.
Looking further, the "value" comes from this field in CompositeCacheManager:
/** The default auxiliary caches to be used if not preconfigured */
protected String defaultAuxValues;
This field is given no default value, and no documentation exists explaining
how an end user might populate this value, or what the significance of this
value is.
The full stack trace looks like this:
Caused by: java.lang.NullPointerException
at java.util.StringTokenizer.<init>(StringTokenizer.java:182)
at java.util.StringTokenizer.<init>(StringTokenizer.java:204)
at
org.apache.jcs.engine.control.CompositeCacheConfigurator.parseRegion(CompositeCacheConfigurator.java:321)
at
org.apache.jcs.engine.control.CompositeCacheConfigurator.parseRegion(CompositeCacheConfigurator.java:283)
at
org.apache.jcs.engine.control.CompositeCacheManager.getCache(CompositeCacheManager.java:448)
at
org.apache.jcs.engine.control.CompositeCacheManager.getCache(CompositeCacheManager.java:387)
at
org.apache.jcs.engine.control.CompositeCacheManager.getCache(CompositeCacheManager.java:374)
at org.apache.jcs.JCS.getInstance(JCS.java:66)
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