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https://issues.apache.org/jira/browse/HIVE-27179?focusedWorklogId=853283&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-853283
]
ASF GitHub Bot logged work on HIVE-27179:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 28/Mar/23 03:21
Start Date: 28/Mar/23 03:21
Worklog Time Spent: 10m
Work Description: dengzhhu653 opened a new pull request, #4164:
URL: https://github.com/apache/hive/pull/4164
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### What changes were proposed in this pull request?
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### Why are the changes needed?
When the jetty-runner jar defeats the javax.servlet.jsp-api jar for loading
JspFactory, a NPE will be here when opening the HS2's home page.
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### Does this PR introduce _any_ user-facing change?
No
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### How was this patch tested?
Apply and compile the changes, place the jetty-runner jar ahead of
CLASSPATH, restart the affected HS2, the NPE is gone.
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Issue Time Tracking
-------------------
Worklog Id: (was: 853283)
Remaining Estimate: 0h
Time Spent: 10m
> HS2 WebUI throws NPE when JspFactory loaded from jetty-runner
> -------------------------------------------------------------
>
> Key: HIVE-27179
> URL: https://issues.apache.org/jira/browse/HIVE-27179
> Project: Hive
> Issue Type: Bug
> Components: HiveServer2
> Reporter: Zhihua Deng
> Priority: Major
> Time Spent: 10m
> Remaining Estimate: 0h
>
> In HIVE-17088{*},{*} we resolved a NPE thrown from HS2 WebUI by introducing
> javax.servlet.jsp-api. It works as expected when the javax.servlet.jsp-api
> jar prevails jetty-runner jar, but things can be different in some
> environments, it still throws NPE when opening the HS2 web:
> {noformat}
> java.lang.NullPointerException
> at
> org.apache.hive.generated.hiveserver2.hiveserver2_jsp._jspService(hiveserver2_jsp.java:286)
>
> at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:71)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
> at
> org.eclipse.jetty.servlet.ServletHolder$NotAsync.service(ServletHolder.java:1443)
>
> at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:791)
> at
> org.eclipse.jetty.servlet.ServletHandler$ChainEnd.doFilter(ServletHandler.java:1626)
> ...{noformat}
> The jetty-runner JspFactory.getDefaultFactory() just returns null.
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