StatusHttpServer is failing if trying to use hadoop as a standalone jar
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Key: HADOOP-575
URL: http://issues.apache.org/jira/browse/HADOOP-575
Project: Hadoop
Issue Type: Bug
Components: dfs
Affects Versions: 0.6.2
Environment: WinXP
Reporter: Paul Malolepsy
Priority: Blocker
I just recently tried to upgrade from hadoop .2 and I am getting an error
during the startup of StatusHttpServer. I did set my hadoop.log.dir, but there
are still errros. Here is my stack below.
java.io.FileNotFoundException:
E:\projects\marzen\file:\E:\projects\marzen\web\WEB-INF\lib\hadoop.jar!\webapps\datanode
at
org.mortbay.jetty.servlet.WebApplicationContext.resolveWebApp(WebApplicationContext.java:266)
at
org.mortbay.jetty.servlet.WebApplicationContext.doStart(WebApplicationContext.java:449)
at org.mortbay.util.Container.start(Container.java:72)
at org.mortbay.http.HttpServer.doStart(HttpServer.java:753)
at org.mortbay.util.Container.start(Container.java:72)
at
org.apache.hadoop.mapred.StatusHttpServer.start(StatusHttpServer.java:177)
at org.apache.hadoop.dfs.DataNode.<init>(DataNode.java:167)
at org.apache.hadoop.dfs.DataNode.makeInstance(DataNode.java:1069)
at org.apache.hadoop.dfs.DataNode.run(DataNode.java:1003)
...rest of stack removed...
The root of the issues seems to be in StatusHttpServer.getWebAppsPath(). Its
possible that I am using hadoop differently than most people (as a standalone
jar in another web app), but I'm not sure how this function could ever work if
you were just using hadoop packaged as a standalone jar. Its trying to get the
webapps path using this line:
URL url = StatusHttpServer.class.getClassLoader().getResource("webapps");
Which is returning the following path. This is a path within the hadoop jar:
file:\E:\projects\marzen\web\WEB-INF\lib\hadoop.jar!\webapps
It then tries to return the canonical path of that wich returns this path:
E:\projects\marzen\file:\E:\projects\marzen\web\WEB-INF\lib\hadoop.jar!\webapps
I don't even think that is a valid path, and the Jetty server certainly doesn't
like it. Is there something I'm doing wrong? Is it possible nobody else is
using hadoop as a standalone jar? Is this a windows specific bug?
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