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https://issues.apache.org/jira/browse/HADOOP-17133?focusedWorklogId=570951&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-570951
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ASF GitHub Bot logged work on HADOOP-17133:
-------------------------------------------
Author: ASF GitHub Bot
Created on: 24/Mar/21 05:52
Start Date: 24/Mar/21 05:52
Worklog Time Spent: 10m
Work Description: aajisaka commented on a change in pull request #2145:
URL: https://github.com/apache/hadoop/pull/2145#discussion_r600192098
##########
File path:
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/http/HttpServer2.java
##########
@@ -669,6 +674,16 @@ private void initializeWebServer(String name, String
hostName,
addDefaultApps(contexts, appDir, conf);
webServer.setHandler(handlers);
+ // Jetty StatisticsHandler should be the first handler.
+ // The handler returns 503 if there is no next handler and the response is
+ // not committed. In Apache Hadoop, there are some servlets that do not
+ // commit (i.e. close) the response. Therefore the handler fails.
Review comment:
- I found why the handler should be inserted and updated the
explanation: https://www.eclipse.org/lists/jetty-users/msg06273.html
- Created a test case for the scenario:
https://github.com/apache/hadoop/pull/2145/commits/34bb0a6855cec3faca4a5b7eec323b5ca273743d
Thank you @Jing9 for your review.
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Issue Time Tracking
-------------------
Worklog Id: (was: 570951)
Time Spent: 40m (was: 0.5h)
> Implement HttpServer2 metrics
> -----------------------------
>
> Key: HADOOP-17133
> URL: https://issues.apache.org/jira/browse/HADOOP-17133
> Project: Hadoop Common
> Issue Type: Improvement
> Components: httpfs, kms
> Reporter: Akira Ajisaka
> Assignee: Akira Ajisaka
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.4.0
>
> Time Spent: 40m
> Remaining Estimate: 0h
>
> I'd like to collect metrics (number of connections, average response time,
> etc...) from HttpFS and KMS but there are no metrics for HttpServer2.
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