[infinispan-issues] [JBoss JIRA] (ISPN-9426) Distributed script execution returning null results in NullPointerException

[Galder Zamarreño (JIRA)]

    [ https://issues.jboss.org/browse/ISPN-9426?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13618572#comment-13618572 ] 

Galder Zamarreño edited comment on ISPN-9426 at 8/14/18 4:07 AM:
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At the protocol level, a null return is sent as an empty byte[]. The java client transforms that into null. I guess that's cos there's no transformation to String? If the user wanted it as text plain String it should be converted to empty String.

Debugging the code the request mediat type is String, so {{testLocalTypedExecNullReturn}} should be expecting empty String instead of null? Then executing the same script distributed should return a collection of empty Strings. [~gustavonalle] ?


was (Author: galder.zamarreno):
At the protocol level, a null return is sent as an empty byte[]. The java client transforms that into null. I guess that's cos there's no transformation to String? If the user wanted it as text plain String it should be converted to empty String.

Debugging the code the request mediat type is String, so {testLocalTypedExecNullReturn} should be expecting empty String instead of null? Then executing the same script distributed should return a collection of empty Strings. [~gustavonalle] ?

> Distributed script execution returning null results in NullPointerException
> ---------------------------------------------------------------------------
>
>                 Key: ISPN-9426
>                 URL: https://issues.jboss.org/browse/ISPN-9426
>             Project: Infinispan
>          Issue Type: Bug
>    Affects Versions: 9.4.0.Beta1
>            Reporter: Galder Zamarreño
>            Assignee: Galder Zamarreño
>             Fix For: 9.4.0.CR1
>
>
> The following script:
> {code}
> // mode=distributed,language=javascript,datatype='text/plain; charset=utf-8'
> cache.get("not-exist");
> {code}
> Results in:
> {code}
> org.infinispan.client.hotrod.exceptions.HotRodClientException:
> Request for messageId=19 returned server error (status=0x85): java.lang.NullPointerException
> 	at org.infinispan.client.hotrod.impl.protocol.Codec20.checkForErrorsInResponseStatus(Codec20.java:338)
> 	at org.infinispan.client.hotrod.impl.protocol.Codec20.readHeader(Codec20.java:180)
> 	at org.infinispan.client.hotrod.impl.transport.netty.HeaderDecoder.decode(HeaderDecoder.java:138)
> 	at org.infinispan.client.hotrod.impl.transport.netty.HintedReplayingDecoder.callDecode(HintedReplayingDecoder.java:98)
> 	at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:265)
> 	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
> 	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
> 	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
> 	at io.netty.handler.timeout.IdleStateHandler.channelRead(IdleStateHandler.java:286)
> 	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
> 	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
> 	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
> 	at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1414)
> 	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
> 	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
> 	at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:945)
> 	at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:146)
> 	at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:645)
> 	at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:580)
> 	at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:497)
> 	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:459)
> 	at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:886)
> 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> 	at java.lang.Thread.run(Thread.java:748)
> {code}
> The issue happens with both latest 2.8 and older 2.5 protocol versions.



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