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From "Henry Manasseh (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-11048) JSON queries are not thread safe
Date Mon, 01 Feb 2016 16:45:39 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-11048?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15126527#comment-15126527
] 

Henry Manasseh commented on CASSANDRA-11048:
--------------------------------------------

I agree. Thanks. I am new to the code. The patch from Ivan is pointing me to the places to
look at in the code.

> JSON queries are not thread safe
> --------------------------------
>
>                 Key: CASSANDRA-11048
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-11048
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Sergio Bossa
>            Priority: Critical
>              Labels: easyfix, newbie, patch
>         Attachments: 0001-Fix-thread-unsafe-usage-of-JsonStringEncoder-see-CAS.patch
>
>
> {{org.apache.cassandra.cql3.Json}} uses a shared instance of {{JsonStringEncoder}} which
is not thread safe (see 1), while {{JsonStringEncoder#getInstance()}} should be used (see
2).
> As a consequence, concurrent {{select JSON}} queries often produce wrong (sometimes unreadable)
results.
> 1. http://grepcode.com/file/repo1.maven.org/maven2/org.codehaus.jackson/jackson-core-asl/1.9.2/org/codehaus/jackson/io/JsonStringEncoder.java
> 2. http://grepcode.com/file/repo1.maven.org/maven2/org.codehaus.jackson/jackson-core-asl/1.9.2/org/codehaus/jackson/io/JsonStringEncoder.java#JsonStringEncoder.getInstance%28%29



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