MetadataMBeanInfoAssembler fails on Tomcat 5.0.30

[ndeloof]

Hello,
I'm using MetadataMBeanInfoAssembler with commons-attributes annotation to export my MBeans. I've migrated from tomcat 4.1 to 5.0.30 and now I've got this exception stack :

java.lang.IllegalArgumentException: Invalid value '0' for field persistPeriod
    at javax.management.modelmbean.DescriptorSupport.checkField(DescriptorSupport.java:258)
    at javax.management.modelmbean.DescriptorSupport.setField(DescriptorSupport.java:82)
    at org.springframework.jmx.export.assembler.MetadataMBeanInfoAssembler.populateMBeanDescriptor(MetadataMBeanInfoAssembler.java:257)

Tomcat comes with jmx.jar (seems to be 1.1.1 jmx version, from mx4j project) that includes a check for "persistPeriod" to be > 0.
MetadataMBeanInfoAssembler sets this MBean attribute if mr.getPersistPeriod() >= 0

And default value for persistPeriod in org.springframework.jmx.export.metadata.ManagedRes ource is ... 0.

I had to update all my annotation to add "persistPeriod=-1".

It would be great to udate MetadataMBeanInfoAssembler to use
mr.getPersistPeriod() > 0.

[Costin Leau]

Raise an issue on jira please. What happens if you upgrade mx4j to the latest version?

[ndeloof]

I've created SPR-1616 for this. I can't find in JMX spec the allowed values for persistPeriod, and so if this check is valid or not.

I've solved this issue in my app by setting persistPeriod=-1 on my attributes.