[
https://issues.apache.org/jira/browse/KARAF-4693?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Paolo Antinori updated KARAF-4693:
----------------------------------
Description:
Karaf shell fails if you run this command:
{code:none}a=shell:new java.util.ArrayList 2
2016-09-02 11:15:51,525 | ERROR | nsole user karaf | ShellUtil
| 43 - org.apache.karaf.shell.core - 4.0.6 | Exception caught while
executing command
java.lang.IllegalStateException
at
org.apache.karaf.shell.support.converter.GenericType.parametersOf(GenericType.java:161)[43:org.apache.karaf.shell.core:4.0.6]
at
org.apache.karaf.shell.support.converter.GenericType.[init](GenericType.java:53)[43:org.apache.karaf.shell.core:4.0.6]
at
org.apache.karaf.shell.support.converter.GenericType.parametersOf(GenericType.java:154)[43:org.apache.karaf.shell.core:4.0.6]
at
org.apache.karaf.shell.support.converter.GenericType.[init](GenericType.java:53)[43:org.apache.karaf.shell.core:4.0.6]
at
org.apache.karaf.shell.commands.impl.NewAction.findMatchingConstructors(NewAction.java:167)[41:org.apache.karaf.shell.commands:4.0.6]
at
org.apache.karaf.shell.commands.impl.NewAction.execute(NewAction.java:89)[41:org.apache.karaf.shell.commands:4.0.6]
at
org.apache.karaf.shell.impl.action.command.ActionCommand.execute(ActionCommand.java:83)[43:org.apache.karaf.shell.core:4.0.6]
at
org.apache.karaf.shell.impl.console.osgi.secured.SecuredCommand.execute(SecuredCommand.java:67)[43:org.apache.karaf.shell.core:4.0.6]
at
org.apache.karaf.shell.impl.console.osgi.secured.SecuredCommand.execute(SecuredCommand.java:87)[43:org.apache.karaf.shell.core:4.0.6]
at
org.apache.felix.gogo.runtime.Closure.executeCmd(Closure.java:480)[43:org.apache.karaf.shell.core:4.0.6]
at
org.apache.felix.gogo.runtime.Closure.executeStatement(Closure.java:406)[43:org.apache.karaf.shell.core:4.0.6]
at
org.apache.felix.gogo.runtime.Pipe.run(Pipe.java:108)[43:org.apache.karaf.shell.core:4.0.6]
at
org.apache.felix.gogo.runtime.Closure.execute(Closure.java:182)[43:org.apache.karaf.shell.core:4.0.6]
at
org.apache.felix.gogo.runtime.Closure.execute(Closure.java:119)[43:org.apache.karaf.shell.core:4.0.6]
at
org.apache.felix.gogo.runtime.CommandSessionImpl.execute(CommandSessionImpl.java:94)[43:org.apache.karaf.shell.core:4.0.6]
at
org.apache.karaf.shell.impl.console.ConsoleSessionImpl.run(ConsoleSessionImpl.java:274)[43:org.apache.karaf.shell.core:4.0.6]
at java.lang.Thread.run(Thread.java:745)[:1.8.0_102]
{code}
The reason for that is not really that it can't handle generics but it the
logic that probe for the best matching constructor, that at some point, in this
class:
https://github.com/apache/karaf/blob/68bef0ced72a3fe192cfe496b3fff654b49b2377/shell/core/src/main/java/org/apache/karaf/shell/support/converter/GenericType.java#L161-L161
sees {{type}} set to {{"? extends E"}} that is not able to handle, thus
throwing the blocking exception.
It's enough to replace that exception with an empty return, to bypass the
failing iteration and have the command to succeed.
was:
Karaf shell fails if you run this command:
{code:a}=shell:new java.util.ArrayList 2
2016-09-02 11:15:51,525 | ERROR | nsole user karaf | ShellUtil
| 43 - org.apache.karaf.shell.core - 4.0.6 | Exception caught while
executing command
java.lang.IllegalStateException
at
org.apache.karaf.shell.support.converter.GenericType.parametersOf(GenericType.java:161)[43:org.apache.karaf.shell.core:4.0.6]
at
org.apache.karaf.shell.support.converter.GenericType.[init](GenericType.java:53)[43:org.apache.karaf.shell.core:4.0.6]
at
org.apache.karaf.shell.support.converter.GenericType.parametersOf(GenericType.java:154)[43:org.apache.karaf.shell.core:4.0.6]
at
org.apache.karaf.shell.support.converter.GenericType.[init](GenericType.java:53)[43:org.apache.karaf.shell.core:4.0.6]
at
org.apache.karaf.shell.commands.impl.NewAction.findMatchingConstructors(NewAction.java:167)[41:org.apache.karaf.shell.commands:4.0.6]
at
org.apache.karaf.shell.commands.impl.NewAction.execute(NewAction.java:89)[41:org.apache.karaf.shell.commands:4.0.6]
at
org.apache.karaf.shell.impl.action.command.ActionCommand.execute(ActionCommand.java:83)[43:org.apache.karaf.shell.core:4.0.6]
at
org.apache.karaf.shell.impl.console.osgi.secured.SecuredCommand.execute(SecuredCommand.java:67)[43:org.apache.karaf.shell.core:4.0.6]
at
org.apache.karaf.shell.impl.console.osgi.secured.SecuredCommand.execute(SecuredCommand.java:87)[43:org.apache.karaf.shell.core:4.0.6]
at
org.apache.felix.gogo.runtime.Closure.executeCmd(Closure.java:480)[43:org.apache.karaf.shell.core:4.0.6]
at
org.apache.felix.gogo.runtime.Closure.executeStatement(Closure.java:406)[43:org.apache.karaf.shell.core:4.0.6]
at
org.apache.felix.gogo.runtime.Pipe.run(Pipe.java:108)[43:org.apache.karaf.shell.core:4.0.6]
at
org.apache.felix.gogo.runtime.Closure.execute(Closure.java:182)[43:org.apache.karaf.shell.core:4.0.6]
at
org.apache.felix.gogo.runtime.Closure.execute(Closure.java:119)[43:org.apache.karaf.shell.core:4.0.6]
at
org.apache.felix.gogo.runtime.CommandSessionImpl.execute(CommandSessionImpl.java:94)[43:org.apache.karaf.shell.core:4.0.6]
at
org.apache.karaf.shell.impl.console.ConsoleSessionImpl.run(ConsoleSessionImpl.java:274)[43:org.apache.karaf.shell.core:4.0.6]
at java.lang.Thread.run(Thread.java:745)[:1.8.0_102]
{code}
The reason for that is not really that it can't handle generics but it the
logic that probe for the best matching constructor, that at some point, in this
class:
https://github.com/apache/karaf/blob/68bef0ced72a3fe192cfe496b3fff654b49b2377/shell/core/src/main/java/org/apache/karaf/shell/support/converter/GenericType.java#L161-L161
sees {{type}} set to {{"? extends E"}} that is not able to handle, thus
throwing the blocking exception.
It's enough to replace that exception with an empty return, to bypass the
failing iteration and have the command to succeed.
> shell:new issue with class wildcards
> ------------------------------------
>
> Key: KARAF-4693
> URL: https://issues.apache.org/jira/browse/KARAF-4693
> Project: Karaf
> Issue Type: Bug
> Components: karaf-shell
> Affects Versions: 4.0.6
> Reporter: Paolo Antinori
>
> Karaf shell fails if you run this command:
> {code:none}a=shell:new java.util.ArrayList 2
> 2016-09-02 11:15:51,525 | ERROR | nsole user karaf | ShellUtil
> | 43 - org.apache.karaf.shell.core - 4.0.6 | Exception caught while
> executing command
> java.lang.IllegalStateException
> at
> org.apache.karaf.shell.support.converter.GenericType.parametersOf(GenericType.java:161)[43:org.apache.karaf.shell.core:4.0.6]
> at
> org.apache.karaf.shell.support.converter.GenericType.[init](GenericType.java:53)[43:org.apache.karaf.shell.core:4.0.6]
> at
> org.apache.karaf.shell.support.converter.GenericType.parametersOf(GenericType.java:154)[43:org.apache.karaf.shell.core:4.0.6]
> at
> org.apache.karaf.shell.support.converter.GenericType.[init](GenericType.java:53)[43:org.apache.karaf.shell.core:4.0.6]
> at
> org.apache.karaf.shell.commands.impl.NewAction.findMatchingConstructors(NewAction.java:167)[41:org.apache.karaf.shell.commands:4.0.6]
> at
> org.apache.karaf.shell.commands.impl.NewAction.execute(NewAction.java:89)[41:org.apache.karaf.shell.commands:4.0.6]
> at
> org.apache.karaf.shell.impl.action.command.ActionCommand.execute(ActionCommand.java:83)[43:org.apache.karaf.shell.core:4.0.6]
> at
> org.apache.karaf.shell.impl.console.osgi.secured.SecuredCommand.execute(SecuredCommand.java:67)[43:org.apache.karaf.shell.core:4.0.6]
> at
> org.apache.karaf.shell.impl.console.osgi.secured.SecuredCommand.execute(SecuredCommand.java:87)[43:org.apache.karaf.shell.core:4.0.6]
> at
> org.apache.felix.gogo.runtime.Closure.executeCmd(Closure.java:480)[43:org.apache.karaf.shell.core:4.0.6]
> at
> org.apache.felix.gogo.runtime.Closure.executeStatement(Closure.java:406)[43:org.apache.karaf.shell.core:4.0.6]
> at
> org.apache.felix.gogo.runtime.Pipe.run(Pipe.java:108)[43:org.apache.karaf.shell.core:4.0.6]
> at
> org.apache.felix.gogo.runtime.Closure.execute(Closure.java:182)[43:org.apache.karaf.shell.core:4.0.6]
> at
> org.apache.felix.gogo.runtime.Closure.execute(Closure.java:119)[43:org.apache.karaf.shell.core:4.0.6]
> at
> org.apache.felix.gogo.runtime.CommandSessionImpl.execute(CommandSessionImpl.java:94)[43:org.apache.karaf.shell.core:4.0.6]
> at
> org.apache.karaf.shell.impl.console.ConsoleSessionImpl.run(ConsoleSessionImpl.java:274)[43:org.apache.karaf.shell.core:4.0.6]
> at java.lang.Thread.run(Thread.java:745)[:1.8.0_102]
> {code}
> The reason for that is not really that it can't handle generics but it the
> logic that probe for the best matching constructor, that at some point, in
> this class:
> https://github.com/apache/karaf/blob/68bef0ced72a3fe192cfe496b3fff654b49b2377/shell/core/src/main/java/org/apache/karaf/shell/support/converter/GenericType.java#L161-L161
> sees {{type}} set to {{"? extends E"}} that is not able to handle, thus
> throwing the blocking exception.
> It's enough to replace that exception with an empty return, to bypass the
> failing iteration and have the command to succeed.
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