[jira] [Comment Edited] (AMBARI-17306) Filter out MOTD logging from 'llapstatus' command in order to get the output which is JSON parsable.

["Swapan Shridhar (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/AMBARI-17306?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15337391#comment-15337391 ] 

Swapan Shridhar edited comment on AMBARI-17306 at 6/18/16 1:14 AM:
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So, for *CASE A*, check for filtering is as follows : 

 - the current line to be : *"{"*, and

 -  next line to be *""amInfo" : {"*.

 -  And last line to be *"}"* 

OR

for *CASE B*, check for filtering is as follows:

   - the current line to be : *"{"*, and

   -  next line to be *"state" :*.

   -  And next to next line to be *"}"* and line is the last one. 

To figure out the start of JSON output.


was (Author: swapanshridhar):
So, for *CASE A*, check for filtering is as follows : 

 - the current line to be : *"{"*, and
 -  next line to be *""amInfo" : {"*.
 -  And last line to be *"}"* 

OR

for *CASE B*, check for filtering is as follows:
   - the current line to be : *"{"*, and
   -  next line to be *"state" :*.
   -  And next to next line to be *"}"* and line is the last one. 

- to figure out the start of JSON output.

> Filter out MOTD logging from 'llapstatus' command in order to get the output which is JSON parsable.
> ----------------------------------------------------------------------------------------------------
>
>                 Key: AMBARI-17306
>                 URL: https://issues.apache.org/jira/browse/AMBARI-17306
>             Project: Ambari
>          Issue Type: Bug
>          Components: ambari-server
>    Affects Versions: 2.4.0
>            Reporter: Swapan Shridhar
>            Assignee: Swapan Shridhar
>             Fix For: 2.4.0
>
>
> Example of expected response which can be JSON parsed:
> *CASE A:*
> {code}
> {
>   "amInfo" : {
>     "appName" : "llap0",
>     "appType" : "org-apache-slider",
>     "appId" : "application_1466036628595_0010",
>     "containerId" : "container_1466036628595_0010_01_000001",
>     "hostname" : "ts-hs2ia-0615-r-2.openstacklocal",
>     "amWebUrl" : "http://ts-hs2ia-0615-r-2.openstacklocal:60865/"
>   },
>   "state" : "LAUNCHING",
>   "originalConfigurationPath" : "hdfs://ts-hs2ia-0615-r-5.openstacklocal:8020/user/hive/.slider/cluster/llap0/snapshot",
>   "generatedConfigurationPath" : "hdfs://ts-hs2ia-0615-r-5.openstacklocal:8020/user/hive/.slider/cluster/llap0/generated",
>   "desiredInstances" : 1,
>   "liveInstances" : 0,
>   "appStartTime" : 1466123287309
> }
> {code}
> The same output with MOTD message:
> {code}
> This is MOTD message
> This is MOTD message1
> {
>   "amInfo" : {
>     "appName" : "llap0",
>     "appType" : "org-apache-slider",
>     "appId" : "application_1466036628595_0010",
>     "containerId" : "container_1466036628595_0010_01_000001",
>     "hostname" : "ts-hs2ia-0615-r-2.openstacklocal",
>     "amWebUrl" : "http://ts-hs2ia-0615-r-2.openstacklocal:60865/"
>   },
>   "state" : "LAUNCHING",
>   "originalConfigurationPath" : "hdfs://ts-hs2ia-0615-r-5.openstacklocal:8020/user/hive/.slider/cluster/llap0/snapshot",
>   "generatedConfigurationPath" : "hdfs://ts-hs2ia-0615-r-5.openstacklocal:8020/user/hive/.slider/cluster/llap0/generated",
>   "desiredInstances" : 1,
>   "liveInstances" : 0,
>   "appStartTime" : 1466123287309
> }
> {code}
> Other scenario can be (eg: APP_NOTFOUND):
> *CASE B:*
> {code}
> This is MOTD message
> This is MOTD message1
> {
>   "state" : "APP_NOT_FOUND"
> }
> {code}
> - We need to filter out extra lines initially added on top of JSON parseable string.



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