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Ahmed Radwan commented on HADOOP-8031: -------------------------------------- Thanks Eli! I have created HADOOP-8749. > Configuration class fails to find embedded .jar resources; should use > URL.openStream() > -------------------------------------------------------------------------------------- > > Key: HADOOP-8031 > URL: https://issues.apache.org/jira/browse/HADOOP-8031 > Project: Hadoop Common > Issue Type: Bug > Components: conf > Affects Versions: 2.0.0-alpha > Reporter: Elias Ross > Assignee: Elias Ross > Fix For: 2.2.0-alpha > > Attachments: 0001-fix-HADOOP-7982-class-loader.patch, > HADOOP-8031-part2.patch, HADOOP-8031.patch, hadoop-8031.txt > > > While running a hadoop client within RHQ (monitoring software) using its > classloader, I see this: > 2012-02-07 09:15:25,313 INFO [ResourceContainer.invoker.daemon-2] > (org.apache.hadoop.conf.Configuration)- parsing > jar:file:/usr/local/rhq-agent/data/tmp/rhq-hadoop-plugin-4.3.0-SNAPSHOT.jar6856622641102893436.classloader/hadoop-core-0.20.2+737+1.jar7204287718482036191.tmp!/core-default.xml > 2012-02-07 09:15:25,318 ERROR [InventoryManager.discovery-1] > (rhq.core.pc.inventory.InventoryManager)- Failed to start component for > Resource[id=16290, type=NameNode, key=NameNode:/usr/lib/hadoop-0.20, > name=NameNode, parent=vg61l01ad-hadoop002.apple.com] from synchronized merge. > org.rhq.core.clientapi.agent.PluginContainerException: Failed to start > component for resource Resource[id=16290, type=NameNode, > key=NameNode:/usr/lib/hadoop-0.20, name=NameNode, > parent=vg61l01ad-hadoop002.apple.com]. > Caused by: java.lang.RuntimeException: core-site.xml not found > at > org.apache.hadoop.conf.Configuration.loadResource(Configuration.java:1308) > at > org.apache.hadoop.conf.Configuration.loadResources(Configuration.java:1228) > at > org.apache.hadoop.conf.Configuration.getProps(Configuration.java:1169) > at org.apache.hadoop.conf.Configuration.set(Configuration.java:438) > This is because the URL > jar:file:/usr/local/rhq-agent/data/tmp/rhq-hadoop-plugin-4.3.0-SNAPSHOT.jar6856622641102893436.classloader/hadoop-core-0.20.2+737+1.jar7204287718482036191.tmp!/core-default.xml > cannot be found by DocumentBuilder (doesn't understand it). (Note: the logs > are for an old version of Configuration class, but the new version has the > same code.) > The solution is to obtain the resource stream directly from the URL object > itself. > That is to say: > {code} > URL url = getResource((String)name); > - if (url != null) { > - if (!quiet) { > - LOG.info("parsing " + url); > - } > - doc = builder.parse(url.toString()); > - } > + doc = builder.parse(url.openStream()); > {code} > Note: I have a full patch pending approval at Apple for this change, > including some cleanup. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira