Sergiy Shyrkov created KARAF-4670:
-------------------------------------
Summary: Race condition in the Activator.updated() of the
org.apache.karaf.cellar.hazelcast
Key: KARAF-4670
URL: https://issues.apache.org/jira/browse/KARAF-4670
Project: Karaf
Issue Type: Bug
Components: cellar-hazelcast
Affects Versions: cellar-4.0.1
Reporter: Sergiy Shyrkov
Priority: Minor
Sometimes on the startup I get an NPE in the
org.apache.karaf.cellar.hazelcast.internal.osgi.Activator.updated() because the
doStart() method execution has not been finished yet and the
hazelcastServiceFactory is still null.
My log is as follows, where the log message about the initialization of the
hazelcastServiceFactory ("init Hazelcast service factory") comes after the call
to Activator.updated() (causes an NPE).
Thank you!
{code}
2016-08-26 14:35:01,780: DEBUG [FelixStartLevel]
org.apache.karaf.cellar.bundle: BundleEvent STARTING -
org.apache.karaf.cellar.bundle
2016-08-26 14:35:01,793: INFO [FelixStartLevel]
org.apache.karaf.shell.impl.action.osgi.CommandExtension: Command registration
delayed for bundle org.apache.karaf.cellar.bundle/4.0.1. Missing dependencies:
[org.apache.karaf.cellar.core.ClusterManager,
org.apache.karaf.cellar.core.GroupManager,
org.apache.karaf.cellar.core.event.EventProducer]
2016-08-26 14:35:01,794: DEBUG [FelixStartLevel]
org.apache.karaf.cellar.bundle: BundleEvent STARTED -
org.apache.karaf.cellar.bundle
2016-08-26 14:35:01,795: DEBUG [FelixStartLevel]
org.apache.karaf.cellar.config: BundleEvent STARTING -
org.apache.karaf.cellar.config
2016-08-26 14:35:01,801: DEBUG [FelixStartLevel]
org.apache.karaf.cellar.config: ServiceEvent REGISTERED -
[org.osgi.service.cm.ManagedService] - org.apache.karaf.cellar.config
2016-08-26 14:35:01,810: INFO [FelixStartLevel]
org.apache.karaf.shell.impl.action.osgi.CommandExtension: Command registration
delayed for bundle org.apache.karaf.cellar.config/4.0.1. Missing dependencies:
[org.apache.karaf.cellar.core.ClusterManager,
org.apache.karaf.cellar.core.GroupManager,
org.apache.karaf.cellar.core.event.EventProducer]
2016-08-26 14:35:01,810: DEBUG [FelixStartLevel]
org.apache.karaf.cellar.config: BundleEvent STARTED -
org.apache.karaf.cellar.config
2016-08-26 14:35:01,811: DEBUG [FelixStartLevel]
org.apache.karaf.cellar.features: BundleEvent STARTING -
org.apache.karaf.cellar.features
2016-08-26 14:35:01,831: INFO [FelixStartLevel]
org.apache.karaf.shell.impl.action.osgi.CommandExtension: Command registration
delayed for bundle org.apache.karaf.cellar.features/4.0.1. Missing
dependencies: [org.apache.karaf.cellar.core.ClusterManager,
org.apache.karaf.cellar.core.GroupManager,
org.apache.karaf.cellar.core.event.EventProducer]
2016-08-26 14:35:01,831: DEBUG [FelixStartLevel]
org.apache.karaf.cellar.features: BundleEvent STARTED -
org.apache.karaf.cellar.features
2016-08-26 14:35:01,832: DEBUG [FelixStartLevel]
org.apache.karaf.cellar.hazelcast: BundleEvent STARTING -
org.apache.karaf.cellar.hazelcast
2016-08-26 14:35:01,839: DEBUG [FelixStartLevel]
org.apache.karaf.cellar.hazelcast: ServiceEvent REGISTERED -
[org.osgi.service.cm.ManagedService] - org.apache.karaf.cellar.hazelcast
2016-08-26 14:35:01,841: INFO [FelixStartLevel]
org.apache.karaf.shell.impl.action.osgi.CommandExtension: Registering commands
for bundle org.apache.karaf.cellar.hazelcast/4.0.1
2016-08-26 14:35:01,841: DEBUG [pool-153-thread-1]
org.apache.karaf.cellar.hazelcast.internal.osgi.Activator: CELLAR HAZELCAST:
init combined class loader
2016-08-26 14:35:01,844: ERROR [CM Configuration Updater (ManagedService
Update: pid=[org.apache.karaf.cellar.discovery])]
org.apache.karaf.cellar.hazelcast.internal.osgi.Activator: Can't update
Hazelcast service factory
java.lang.NullPointerException
at
org.apache.karaf.cellar.hazelcast.internal.osgi.Activator.updated(Activator.java:392)
at
org.apache.felix.cm.impl.helper.ManagedServiceTracker.updated(ManagedServiceTracker.java:189)
at
org.apache.felix.cm.impl.helper.ManagedServiceTracker.updateService(ManagedServiceTracker.java:152)
at
org.apache.felix.cm.impl.helper.ManagedServiceTracker.provideConfiguration(ManagedServiceTracker.java:85)
at
org.apache.felix.cm.impl.ConfigurationManager$ManagedServiceUpdate.provide(ConfigurationManager.java:1444)
at
org.apache.felix.cm.impl.ConfigurationManager$ManagedServiceUpdate.run(ConfigurationManager.java:1400)
at org.apache.felix.cm.impl.UpdateThread.run0(UpdateThread.java:143)
at org.apache.felix.cm.impl.UpdateThread.run(UpdateThread.java:110)
at java.lang.Thread.run(Thread.java:745)
2016-08-26 14:35:01,851: DEBUG [FelixStartLevel]
org.apache.karaf.cellar.hazelcast: BundleEvent STARTED -
org.apache.karaf.cellar.hazelcast
2016-08-26 14:35:01,854: DEBUG [pool-153-thread-1]
org.apache.karaf.cellar.hazelcast.internal.osgi.Activator: CELLAR HAZELCAST:
start the discovery service tracker
2016-08-26 14:35:01,855: DEBUG [FelixStartLevel] org.apache.karaf.cellar.shell:
BundleEvent STARTING - org.apache.karaf.cellar.shell
2016-08-26 14:35:01,855: DEBUG [pool-153-thread-1]
org.apache.karaf.cellar.hazelcast.internal.osgi.Activator: CELLAR HAZELCAST:
start the synchronizer service tracker
2016-08-26 14:35:01,857: DEBUG [pool-153-thread-1]
org.apache.karaf.cellar.hazelcast.internal.osgi.Activator: CELLAR
HAZELCAST:init dispatcher
2016-08-26 14:35:01,858: DEBUG [pool-153-thread-1]
org.apache.karaf.cellar.hazelcast.internal.osgi.Activator: CELLAR HAZELCAST:
create Hazelcast configuration manager
2016-08-26 14:35:01,859: DEBUG [pool-153-thread-1]
org.apache.karaf.cellar.hazelcast.internal.osgi.Activator: CELLAR
HAZELCAST:init Hazelcast service factory
2016-08-26 14:35:01,862: DEBUG [pool-153-thread-1]
org.apache.karaf.cellar.hazelcast.internal.osgi.Activator: CELLAR
HAZELCAST:register Hazelcast instance
{code}
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