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From "Takanobu Asanuma (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-14037) Fix SSLFactory truststore reloader thread leak in URLConnectionFactory
Date Fri, 25 Jan 2019 06:52:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-14037?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16751953#comment-16751953

Takanobu Asanuma commented on HDFS-14037:

I implemented SSLConnectionConfigurator class instead of {{URLConnectionFactory#newSslConnConfigurator}}.
Both override {{ConnectionConfigurator#configure}}, and both {{configure()}} methods are only
called in {{URLConnectionFactory#openConnection}}. Are not they the same?

> Fix SSLFactory truststore reloader thread leak in URLConnectionFactory
> ----------------------------------------------------------------------
>                 Key: HDFS-14037
>                 URL: https://issues.apache.org/jira/browse/HDFS-14037
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: hdfs-client, webhdfs
>            Reporter: Takanobu Asanuma
>            Assignee: Takanobu Asanuma
>            Priority: Major
>         Attachments: HDFS-14037.1.patch, HDFS-14037.2.patch
> This is reported by [~yoshiata]. It is a similar issue as HADOOP-11368 and YARN-5309
in URLConnectionFactory.
> {quote}SSLFactory in newSslConnConfigurator and subsequently creates the ReloadingX509TrustManager
instance which in turn starts a trust store reloader thread.
> However, the SSLFactory is never destroyed and hence the trust store reloader threads
are not killed.
> {quote}
> We observed many leaked threads when we used swebhdfs via NiFi cluster.
> {noformat}
> "Truststore reloader thread" Id=221 TIMED_WAITING  on null
>         at java.lang.Thread.sleep(Native Method)
>         at org.apache.hadoop.security.ssl.ReloadingX509TrustManager.run(ReloadingX509TrustManager.java:189)
>         at java.lang.Thread.run(Thread.java:748)
> {noformat}

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