redeploying Fuse services/bundles seems to require a restart

[richard.ballard]

Hello,

I am new to JBoss Fuse and am evaluating it for my employer.  I am running Fuse version 6.3 - e.g.:

JBossFuse:karaf@root> version

2.4.0.redhat-630187

I have a simple case where there is a bundle (known as 'serviceA') at version 5.0 that exports a service (rbtest.servicea.TextTransformer).  I have a service consumer (known as 'clientA') that imports a range of the service from 5.0 -> 6.0, e.g.

<dependency>

   <groupId>com.rbtest</groupId>

   <artifactId>serviceA</artifactId>

   <version>[5.0,6)</version>

</dependency>

This all seems to work on initial load of bundles.

My issue is that when I update serviceA from 5.0 to 5.1 (with no changes to the service semantics, just an internal change to the service) and restart clientA I see the following in the log:

2017-05-02 11:41:57,079 | INFO  | l Console Thread | BlueprintContainerImpl

| 23 - org.apache.aries.blueprint.core - 1.4.5 | Bundle com.rbtest.clientA/5.0.0 is waiting for dependencies [(objectClass=rbtest.servicea.TextTransformer)]

I can see in the headers of serviceA that it is exporting the service in the required range:

JBossFuse:karaf@root> headers 439

serviceA (439)

...

Export-Service =

    rbtest.servicea.TextTransformer;transformer.language=english

Export-Package =

    rbtest.servicea;version=5.1.0

Import-Package =

    org.osgi.service.blueprint;version="[1.0.0,2.0.0)"

and I can see in the headers of clientA that it is importing the required range:

JBossFuse:karaf@root> headers 438

clientA (438)

...

Import-Service =

    org.fusesource.example.service.HelloWorldSvc;multiple:=false,

    rbtest.servicea.TextTransformer;multiple:=false

Export-Package =

    rbtest.clienta;uses:="org.fusesource.example.service,rbtest.servicea";version=5.0.0

Import-Package =

    org.fusesource.example.service;version="[1.0,2)",

    org.osgi.service.blueprint;version="[1.0.0,2.0.0)",

    rbtest.servicea;version="[5.0,6)"

So, it seems that clientA is stuck waiting for the dependency rbtest.servicea.TextTransformer that never comes.

Some workarounds I found are:

• reinstalling the clientA bundle (and restarting it)
• restarting fuse

Both of these work (i.e. no hanging on waiting for dependencies) but obviously these will neither scale well nor work in a production deployment.

Thanks in advance for your help,

Richard