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From "liyang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (KYLIN-3060) The logical processing of creating or updating streaming table has a bug in server, which will cause a NullPointerException.
Date Sun, 03 Dec 2017 05:13:00 GMT

    [ https://issues.apache.org/jira/browse/KYLIN-3060?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16275826#comment-16275826
] 

liyang commented on KYLIN-3060:
-------------------------------

Code merged. Thanks Jianhua!
https://github.com/apache/kylin/commit/e53257d1fad0edc43cc625b4e3bc63723e403f4e

Please note the code format in the future. I made a follow up commit to format the code.
https://github.com/apache/kylin/commit/c5d1fd07f5cb16978b1cc626edf556c0a2be4dcf


> The logical processing of creating or updating streaming table has a bug in server, which
will cause a NullPointerException.
> ----------------------------------------------------------------------------------------------------------------------------
>
>                 Key: KYLIN-3060
>                 URL: https://issues.apache.org/jira/browse/KYLIN-3060
>             Project: Kylin
>          Issue Type: Bug
>          Components: streaming
>            Reporter: peng.jianhua
>            Assignee: peng.jianhua
>              Labels: patch
>         Attachments: 0001-KYLIN-3060-The-logical-processing-of-creating-or-upd.patch,
after_repaired.png, create_non_interger_ID.png, edit_non_interger_ID.png
>
>
> When you set the invalid parameter for creating or updating a streaming table, the client
will show an error message dialog, refer to [^create_non_interger_ID.png] and [^edit_non_interger_ID.png].
> I analyze the Kylin server log, there are some null pointer exceptions, then I analyze
the StreamingController.java, whose logical processing of streaming table has a bug, which
will cause a NullPointerException. 
> eg. When the streamingRequest.getKafkaConfig() has a invalid pamamter, the kafkaConfig
will be null, then "if (desc.getUuid() == null || desc.getName() == null) " in function "org.apache.kylin.source.kafka.KafkaConfigManager.updateKafkaConfig"
will cause the NullPointerException.
> {code:java}
> public StreamingRequest updateStreamingConfig(@RequestBody StreamingRequest streamingRequest)
throws JsonProcessingException {
>   ......
>   KafkaConfig kafkaConfig = deserializeKafkaSchemalDesc(streamingRequest);
>   ......
>   kafkaConfig = kafkaConfigService.updateKafkaConfig(kafkaConfig, project);
>   ......
> }
>     private KafkaConfig deserializeKafkaSchemalDesc(StreamingRequest streamingRequest)
{
>         KafkaConfig desc = null;
>         try {
>             logger.debug("Saving KafkaConfig " + streamingRequest.getKafkaConfig());
>             desc = JsonUtil.readValue(streamingRequest.getKafkaConfig(), KafkaConfig.class);
>         } catch (JsonParseException e) {
>             logger.error("The KafkaConfig definition is invalid.", e);
>             updateRequest(streamingRequest, false, e.getMessage());
>         } catch (JsonMappingException e) {
>             logger.error("The data KafkaConfig definition is invalid.", e);
>             updateRequest(streamingRequest, false, e.getMessage());
>         } catch (IOException e) {
>             logger.error("Failed to deal with the request.", e);
>             throw new InternalErrorException("Failed to deal with the request:" + e.getMessage(),
e);
>         }
>         return desc;
>     }
>     public StreamingConfig updateStreamingConfig(StreamingConfig config, String project)
throws IOException {
>         aclEvaluate.checkProjectAdminPermission(project);
>         return getStreamingManager().updateStreamingConfig(config);
>     }
>     public StreamingConfig updateStreamingConfig(StreamingConfig desc) throws IOException
{
>         // Validate CubeDesc
>         if (desc.getUuid() == null || desc.getName() == null) {
>     ......
>    }
> {code}
> So I have repaired it, then the client will tell you the detail error message( refer
to [^after_repaired.png]), the server no longer throws an null point exception.
> you can check the patch, thanks!
> {panel:title=Kylin server log}
> 2017-11-24 18:38:00,702 ERROR [http-bio-7070-exec-14] controller.StreamingController:202
: Failed to deal with the request:null
> {color:red}java.lang.NullPointerException{color}
>         at org.apache.kylin.source.kafka.KafkaConfigManager.updateKafkaConfig(KafkaConfigManager.java:156)
>         at org.apache.kylin.rest.service.KafkaConfigService.updateKafkaConfig(KafkaConfigService.java:84)
>         {color:red}at org.apache.kylin.rest.controller.StreamingController.updateStreamingConfig(StreamingController.java:198){color}
> {panel}



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