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https://issues.apache.org/jira/browse/HBASE-20571?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16479646#comment-16479646
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Hudson commented on HBASE-20571:
--------------------------------

Results for branch branch-1.4
        [build #324 on 
builds.a.o|https://builds.apache.org/job/HBase%20Nightly/job/branch-1.4/324/]: 
(x) *{color:red}-1 overall{color}*
----
details (if available):

(x) {color:red}-1 general checks{color}
-- For more information [see general 
report|https://builds.apache.org/job/HBase%20Nightly/job/branch-1.4/324//General_Nightly_Build_Report/]


(x) {color:red}-1 jdk7 checks{color}
-- For more information [see jdk7 
report|https://builds.apache.org/job/HBase%20Nightly/job/branch-1.4/324//JDK7_Nightly_Build_Report/]


(x) {color:red}-1 jdk8 hadoop2 checks{color}
-- For more information [see jdk8 (hadoop2) 
report|https://builds.apache.org/job/HBase%20Nightly/job/branch-1.4/324//JDK8_Nightly_Build_Report_(Hadoop2)/]




(/) {color:green}+1 source release artifact{color}
-- See build output for details.


> JMXJsonServlet generates invalid JSON if it has NaN in metrics
> --------------------------------------------------------------
>
>                 Key: HBASE-20571
>                 URL: https://issues.apache.org/jira/browse/HBASE-20571
>             Project: HBase
>          Issue Type: Bug
>          Components: UI
>            Reporter: Balazs Meszaros
>            Assignee: Balazs Meszaros
>            Priority: Major
>             Fix For: 3.0.0, 2.1.0, 1.5.0, 1.3.3, 2.0.1, 1.4.5
>
>         Attachments: HBASE-20571.branch-1.003.patch, 
> HBASE-20571.branch-1.004.patch, HBASE-20571.branch-2.0.001.patch, 
> HBASE-20571.branch-2.0.002.patch, HBASE-20571.branch-2.0.002.patch, 
> HBASE-20571.branch-2.0.003.patch
>
>
> {{/jmx}} servlet responses invalid JSON, if some metrics are NaN:
> {code}
>     "l1CacheHitCount" : 0,
>     "l1CacheMissCount" : 0,
>     "l1CacheHitRatio" : NaN,
>     "l1CacheMissRatio" : NaN,
>     "l2CacheHitCount" : 0,
>     "l2CacheMissCount" : 0,
>     "l2CacheHitRatio" : 0.0,
>     "l2CacheMissRatio" : 0.0,
> {code}
> NaN is an invalid character sequence in JSON. We should not response NaN in 
> metrics.



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