| [equinox-dev] DS activation and error logging |
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Hi all, I have recently upgraded to the release candidate versions
of Equinox 3.5 and am seeing some unexpected behavior from DS. The first question I have is in regard to component
activation. In the RC versions I have noticed that if an exception is thrown in
the activate() method, the SCR will attempt to instantiate the component again,
a variable number of times. As far as I can tell, this number of times seems to
be related to how many other bundles (components/services) are activated within
the framework. So, for example: protected void activate(ComponentContext context) { System.out.println(“Failing
activation”); throw new RuntimeException(); } “Failing activation” will be printed once for a
run configuration that includes that bundle, the OSGi bundles, and nothing
else. However, if a number of other bundles are activated, it can appear more
than once. Is the SCR attempting to start this bundle repeatedly? If so, does
that behavior jive with the specification? This behavior is new to the 3.5
releases, and did not occur in 3.4.2. The second question I have is regarding the exception
logging behavior of DS. What has been doubly confusing about this simple example
situation is that I am not seeing any report about the exception thrown in the
activate() method. No log file is generated in the configuration directory, and
no stack trace is printed to the console. (I’m using the –consoleLog
program argument). The strange thing is that if I use a much more complex run
configuration with many bundles using DS, I can slip an exception into the
activate() method of one of them and I will see the log file and console
statements generated. The set of Equinox jars I am using is (3.5 RC4): org.eclipse.equinox.ds_1.1.0.v20090601.jar org.eclipse.equinox.event_1.1.100.v20090520-1800.jar org.eclipse.equinox.log_1.2.0.v20090520-1800.jar org.eclipse.equinox.util_1.0.100.v20090520-1800.jar org.eclipse.osgi.services_3.2.0.v20090520-1800.jar org.eclipse.osgi.util_3.2.0.v20090520-1800.jar org.eclipse.osgi_3.5.0.v20090520.jar Program arguments are: -console –consoleLog Any thoughts or advice would be appreciated. Thanks, -Mike Furtak
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