[GitHub] [hadoop] sunchao commented on pull request #5695: HADOOP-18750. Remove javax/servlet shading in hadoop-client-api

["sunchao (via GitHub)" <gi...@apache.org>]

sunchao commented on PR #5695:
URL: https://github.com/apache/hadoop/pull/5695#issuecomment-1581196632

   @jojochuang @ayushtkn I think this has been an issue for a while (see https://issues.apache.org/jira/browse/SPARK-40964 for the same bug report) too, but just hasn't got a lot of attention.
   
   Long time back we also encountered a similar issue related to `javax.servlet` (see the discussions [here](https://issues.apache.org/jira/browse/SPARK-33212?page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel&focusedCommentId=17289618#comment-17289618)). In the end we found a workaround in Spark itself.
   
   > +2021-02-24 08:36:54,391 ERROR org.apache.spark.SparkContext: Error initializing SparkContext.
   java.lang.IllegalStateException: class org.apache.hadoop.yarn.server.webproxy.amfilter.AmIpFilter is not a javax.servlet.Filter+
   
   In summary I think it'd be helpful to exclude `javax.servlet` from relocation. 
   


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