I do agree that Felix can be very opaque when restarts occur. We usually end up
sprinkling breakpoints around or attaching BTrace to log framework internals.
refreshOptionalPackages() is often the cause. Some better logging about the
trigger and cause of the refresh would be great. I know that we lose visibility
to the root trigger as the events propagate across different threads, but
someone ambitious/crafty should be able to handle it.
-Nick Baker
________________________________
From: Charlie Mordant <cmorda...@gmail.com>
Sent: Tuesday, January 31, 2017 4:39:32 AM
To: user@karaf.apache.org
Subject: Bundle restart are hard to tackle
Hi users of the world's best application server ever ;-),
I'm struggling with feature resolution, and would like to have your POV.
This issue is concerning, the JDBC, the Blueprint and the transactional feature.
Here's the issue with feature resolution in my pax-exam test:
* The jdbc-pool-aries feature starts first (+ the config one and the cfg \o/).
* Then the transactional feature
* The third feature thats start is the aries jndi one, so the two datasources
(the XA and non-XA ones) are exposed (\o/\o/).
* But the third that starts is the blueprint one, which starts the
xbean-blueprint bundle.
That blueprint bundle restarts the 'optional' resolutions of aries transaction
manager, which then restarts aries-jdbc modules (optional res again) & config,
which stops the datasource and starts another one.
Unfortunately, at this point, my 'daos' bundle is already linked with a proxy
to the 'old' datasource.
A way to fix it is to reference the 'transaction' feature in the 'pool-aries'
one, and the 'blueprint' one in the 'transaction' one, but it would then break
some modularity.
Have you got an idea on how to properly handle it?
The actual xml of my features, they're slightly similar to the karaf ones, with
bundle versions aligned:
[code]
<feature name="osgiliath-pax-jdbc-pool-aries" description="Provides JDBC
Pooling DataSourceFactory using Aries Transaction JDBC"
version="${org.ops4j.pax.jdbc_pax-jdbc-features.version}" resolver="(obr)">
<feature>osgiliath-pax-jdbc-spec</feature>
<bundle>mvn:org.ops4j.pax.jdbc/pax-jdbc-pool-common/${org.ops4j.pax.jdbc_pax-jdbc-pool-common.version}</bundle>
<bundle>mvn:org.ops4j.pax.jdbc/pax-jdbc-pool-aries/${org.ops4j.pax.jdbc_pax-jdbc-pool-aries.version}</bundle>
<conditional>
<condition>osgiliath-aries-blueprint</condition>
<bundle
dependency="true">mvn:org.apache.xbean/xbean-blueprint/${org.apache.xbean_xbean-blueprint.version}</bundle>
</conditional>
<conditional>
<condition>osgiliath-transaction</condition>
<bundle
dependency="true">mvn:org.apache.aries.transaction/org.apache.aries.transaction.jdbc/${org.apache.aries.transaction_org.apache.aries.transaction.jdbc.version}</bundle>
</conditional>
</feature>
<feature name="osgiliath-transaction" description="OSGi Transaction
Manager"
version="${org.apache.aries.transaction_org.apache.aries.transaction.manager.version}">
<config name="org.apache.aries.transaction" append="false">
aries.transaction.recoverable = true
aries.transaction.timeout = 600
aries.transaction.howl.logFileDir = ${karaf.data}/txlog
aries.transaction.howl.maxLogFiles = 2
aries.transaction.howl.maxBlocksPerFile = 512
aries.transaction.howl.bufferSize = 4
</config>
<feature version="${transaction-api_feature.version}"
prerequisite="false" dependency="false">osgiliath-transaction-api</feature>
<bundle
dependency="true">mvn:org.apache.aries/org.apache.aries.util/${org.apache.aries_org.apache.aries.util.version}</bundle>
<bundle>mvn:org.apache.aries.transaction/org.apache.aries.transaction.manager/${org.apache.aries.transaction_org.apache.aries.transaction.manager.version}</bundle>
<conditional>
<condition>osgiliath-aries-blueprint</condition>
<bundle
dependency="true">mvn:org.apache.felix/org.apache.felix.coordinator/${org.apache.felix_org.apache.felix.coordinator.version}</bundle>
<bundle>mvn:org.apache.aries.transaction/org.apache.aries.transaction.blueprint/${org.apache.aries.transaction_org.apache.aries.transaction.blueprint.version1}</bundle>
<bundle>mvn:org.apache.aries.transaction/org.apache.aries.transaction.blueprint/${org.apache.aries.transaction_org.apache.aries.transaction.blueprint.version}</bundle>
<bundle
dependency="true">mvn:org.apache.xbean/xbean-blueprint/${org.apache.xbean_xbean-blueprint.version}</bundle>
</conditional>
<conditional>
<condition>osgiliath-spring</condition>
<feature version="${org.apache.servicemix.bundles.spring.version}"
dependency="true">osgiliath-spring-tx</feature>
</conditional>
</feature>
********************************************************* Additional
informations ******************************************
<feature name="osgiliath-transaction-api"
version="${transaction-api_feature.version}">
<bundle
dependency="true">mvn:javax.interceptor/javax.interceptor-api/${javax.interceptor_javax.interceptor-api.version}</bundle>
<bundle
dependency="true">mvn:org.apache.geronimo.specs/geronimo-atinject_1.0_spec/${org.apache.geronimo.specs_geronimo-atinject_1.0_spec.version}</bundle>
<bundle
dependency="true">mvn:javax.el/javax.el-api/${javax.el_javax.el-api.version}</bundle>
<bundle
dependency="true">mvn:javax.enterprise/cdi-api/${javax.enterprise_cdi-api.version}</bundle>
<bundle>mvn:javax.transaction/javax.transaction-api/${javax.transaction_javax.transaction-api.version}</bundle>
</feature>
<feature name="osgiliath-persistence-api" description="Persistence API"
version="${persistence-api_feature.version}">
<bundle>mvn:org.apache.geronimo.specs/geronimo-jpa_2.0_spec/${org.apache.geronimo.specs_geronimo-jpa_2.0_spec.version}</bundle>
<bundle>mvn:org.apache.geronimo.specs/geronimo-osgi-registry/${org.apache.geronimo.specs_geronimo-osgi-registry.version}</bundle>
</feature>
<feature name="osgiliath-jpa" description="OSGi Persistence Container"
version="${org.apache.aries.jpa.version}">
<feature version="${transaction-api_feature.version}"
prerequisite="false" dependency="false">osgiliath-transaction-api</feature>
<feature version="${persistence-api_feature.version}"
prerequisite="false" dependency="false">osgiliath-persistence-api</feature>
<bundle
dependency="true">mvn:org.apache.felix/org.apache.felix.coordinator/${org.apache.felix_org.apache.felix.coordinator.version}</bundle>
<bundle
dependency="true">mvn:org.osgi/org.osgi.service.jdbc/${org.osgi_org.osgi.service.jdbc.version}</bundle>
<bundle>mvn:org.apache.aries.jpa/org.apache.aries.jpa.api/${org.apache.aries.jpa_org.apache.aries.jpa.api.version}</bundle>
<bundle>mvn:org.apache.aries.jpa/org.apache.aries.jpa.container/${org.apache.aries.jpa_org.apache.aries.jpa.container.version}</bundle>
<bundle>mvn:org.apache.aries.jpa/org.apache.aries.jpa.support/${org.apache.aries.jpa_org.apache.aries.jpa.support.version}</bundle>
<conditional>
<condition>osgiliath-aries-blueprint</condition>
<bundle>mvn:org.apache.aries.jpa/org.apache.aries.jpa.blueprint/${org.apache.aries.jpa_org.apache.aries.jpa.blueprint.version}</bundle>
</conditional>
</feature>
<feature name="osgiliath-openjpa" description="Apache OpenJPA 2.4.x
persistence engine support" version="${org.apache.openjpa.version}">
<feature prerequisite="false"
dependency="false">osgiliath-jndi</feature>
<feature version="${transaction-api_feature.version}"
prerequisite="false" dependency="false">osgiliath-transaction-api</feature>
<feature version="${persistence-api_feature.version}"
prerequisite="false" dependency="false">osgiliath-persistence-api</feature>
<bundle
dependency="true">mvn:javax.servlet/javax.servlet-api/${javax.servlet_javax.servlet-api.version}</bundle>
<bundle
dependency="true">mvn:javax.el/javax.el-api/${javax.el_javax.el-api.version}</bundle>
<bundle
dependency="true">mvn:commons-lang/commons-lang/${commons-lang_commons-lang.version}</bundle>
<bundle
dependency="true">mvn:commons-collections/commons-collections/${commons-collections_commons-collections.version}</bundle>
<bundle
dependency="true">mvn:commons-pool/commons-pool/${commons-pool_commons-pool.version}</bundle>
<bundle
dependency="true">mvn:org.apache.servicemix.bundles/org.apache.servicemix.bundles.commons-dbcp/${org.apache.servicemix.bundles_org.apache.servicemix.bundles.commons-dbcp.version}</bundle>
<bundle
dependency="true">mvn:org.apache.servicemix.bundles/org.apache.servicemix.bundles.ant/${org.apache.servicemix.bundles_org.apache.servicemix.bundles.ant.version}</bundle>
<bundle
dependency="true">mvn:org.apache.servicemix.bundles/org.apache.servicemix.bundles.serp/${org.apache.servicemix.bundles_org.apache.servicemix.bundles.serp.version}</bundle>
<bundle
dependency="true">mvn:org.apache.geronimo.specs/geronimo-jms_1.1_spec/${org.apache.geronimo.specs_geronimo-jms_1.1_spec.version}</bundle>
<bundle
dependency="true">mvn:org.apache.xbean/xbean-asm5-shaded/${org.apache.xbean_xbean-asm5-shaded.version}</bundle>
<bundle>mvn:org.apache.openjpa/openjpa/${org.apache.openjpa_openjpa.version}</bundle>
</feature>
<feature name="osgiliath-connector"
version="${org.apache.geronimo.components_geronimo-connector.version}"
description="OSGi Support for JCA Connector 1.6" resolver="(obr)">
<feature
version="${org.apache.aries.transaction_org.apache.aries.transaction.manager.version}">osgiliath-transaction</feature>
<bundle
dependency="true">mvn:org.apache.geronimo.specs/geronimo-j2ee-connector_1.6_spec/${org.apache.geronimo.specs_geronimo-j2ee-connector_1.6_spec.version}</bundle>
<bundle
dependency="true">mvn:javax.validation/validation-api/${javax.validation_validation-api.version}</bundle>
<bundle>mvn:org.apache.geronimo.components/geronimo-connector/${org.apache.geronimo.components_geronimo-connector.version}</bundle>
</feature>
<feature name="osgiliath-jpa" description="OSGi Persistence Container"
version="${org.apache.aries.jpa.version}">
<feature version="${transaction-api_feature.version}"
prerequisite="false" dependency="false">osgiliath-transaction-api</feature>
<feature version="${persistence-api_feature.version}"
prerequisite="false" dependency="false">osgiliath-persistence-api</feature>
<bundle
dependency="true">mvn:org.apache.felix/org.apache.felix.coordinator/${org.apache.felix_org.apache.felix.coordinator.version}</bundle>
<bundle
dependency="true">mvn:org.osgi/org.osgi.service.jdbc/${org.osgi_org.osgi.service.jdbc.version}</bundle>
<bundle>mvn:org.apache.aries.jpa/org.apache.aries.jpa.api/${org.apache.aries.jpa_org.apache.aries.jpa.api.version}</bundle>
<bundle>mvn:org.apache.aries.jpa/org.apache.aries.jpa.container/${org.apache.aries.jpa_org.apache.aries.jpa.container.version}</bundle>
<bundle>mvn:org.apache.aries.jpa/org.apache.aries.jpa.support/${org.apache.aries.jpa_org.apache.aries.jpa.support.version}</bundle>
<conditional>
<condition>osgiliath-aries-blueprint</condition>
<bundle>mvn:org.apache.aries.jpa/org.apache.aries.jpa.blueprint/${org.apache.aries.jpa_org.apache.aries.jpa.blueprint.version}</bundle>
</conditional>
</feature>
<feature name="osgiliath-openjpa" description="Apache OpenJPA 2.4.x
persistence engine support" version="${org.apache.openjpa.version}">
<details>Enable Apache OpenJPA as persistence engine.</details>
<feature prerequisite="false"
dependency="false">osgiliath-jndi</feature>
<feature version="${transaction-api_feature.version}"
prerequisite="false" dependency="false">osgiliath-transaction-api</feature>
<feature version="${persistence-api_feature.version}"
prerequisite="false" dependency="false">osgiliath-persistence-api</feature>
<bundle
dependency="true">mvn:javax.servlet/javax.servlet-api/${javax.servlet_javax.servlet-api.version}</bundle>
<bundle
dependency="true">mvn:javax.el/javax.el-api/${javax.el_javax.el-api.version}</bundle>
<bundle
dependency="true">mvn:commons-lang/commons-lang/${commons-lang_commons-lang.version}</bundle>
<bundle
dependency="true">mvn:commons-collections/commons-collections/${commons-collections_commons-collections.version}</bundle>
<bundle
dependency="true">mvn:commons-pool/commons-pool/${commons-pool_commons-pool.version}</bundle>
<bundle
dependency="true">mvn:org.apache.servicemix.bundles/org.apache.servicemix.bundles.commons-dbcp/${org.apache.servicemix.bundles_org.apache.servicemix.bundles.commons-dbcp.version}</bundle>
<bundle
dependency="true">mvn:org.apache.servicemix.bundles/org.apache.servicemix.bundles.ant/${org.apache.servicemix.bundles_org.apache.servicemix.bundles.ant.version}</bundle>
<bundle
dependency="true">mvn:org.apache.servicemix.bundles/org.apache.servicemix.bundles.serp/${org.apache.servicemix.bundles_org.apache.servicemix.bundles.serp.version}</bundle>
<bundle
dependency="true">mvn:org.apache.geronimo.specs/geronimo-jms_1.1_spec/${org.apache.geronimo.specs_geronimo-jms_1.1_spec.version}</bundle>
<bundle
dependency="true">mvn:org.apache.xbean/xbean-asm5-shaded/${org.apache.xbean_xbean-asm5-shaded.version}</bundle>
<bundle>mvn:org.apache.openjpa/openjpa/${org.apache.openjpa_openjpa.version}</bundle>
</feature>
<feature name='osgiliath-persistence' version='${project.version}'
resolver="(obr)" start-level="41" description="Java persistence API stack" >
<bundle
dependency='true'>mvn:javax.servlet/javax.servlet-api/${javax.servlet_javax.servlet-api.version}</bundle>
<feature version="${project.version}">osgiliath-jdbc</feature>
<feature
version="${org.apache.geronimo.components_geronimo-connector.version}">osgiliath-connector</feature>
<feature
version="${org.apache.aries.jpa.version}">osgiliath-jpa</feature>
<bundle
dependency='true'>mvn:org.osgi/org.osgi.service.jpa/${org.osgi_org.osgi.service.jpa.version}</bundle>
<feature
version="${org.apache.openjpa.version}">osgiliath-openjpa</feature>
<feature
version="${org.apache.karaf.features_standard.version}">osgiliath-aries-blueprint</feature>
<bundle>mvn:org.apache.xbean/xbean-reflect/${org.apache.xbean_xbean-reflect.version}</bundle>
<feature
version="${project.version}">osgiliath-spring-data-jpa</feature>
<conditional>
<condition>osgiliath-rest-management</condition>
<bundle start-level="35"
dependency="true">mvn:io.swagger/swagger-annotations/${io.swagger_swagger-annotations.version}</bundle>
</conditional>
</feature>
[/code]
Best regards, and keep up bringing the OSGI dream comes true ;-)
--
Charlie Mordant
Full OSGI/EE stack made with Karaf:
https://github.com/OsgiliathEnterprise/net.osgiliath.parent
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