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Hadoop QA commented on HADOOP-10181: ------------------------------------ {color:red}-1 overall{color}. Here are the results of testing the latest attachment http://issues.apache.org/jira/secure/attachment/12693319/HADOOP-10181.001.patch against trunk revision c94c0d2. {color:green}+1 @author{color}. The patch does not contain any @author tags. {color:green}+1 tests included{color}. The patch appears to include 2 new or modified test files. {color:green}+1 javac{color}. The applied patch does not increase the total number of javac compiler warnings. {color:green}+1 javadoc{color}. There were no new javadoc warning messages. {color:green}+1 eclipse:eclipse{color}. The patch built with eclipse:eclipse. {color:red}-1 findbugs{color}. The patch appears to introduce 1 new Findbugs (version 2.0.3) warnings. {color:green}+1 release audit{color}. The applied patch does not increase the total number of release audit warnings. {color:red}-1 core tests{color}. The patch failed these unit tests in hadoop-common-project/hadoop-common: org.apache.hadoop.ha.TestZKFailoverController Test results: https://builds.apache.org/job/PreCommit-HADOOP-Build/5434//testReport/ Findbugs warnings: https://builds.apache.org/job/PreCommit-HADOOP-Build/5434//artifact/patchprocess/newPatchFindbugsWarningshadoop-common.html Console output: https://builds.apache.org/job/PreCommit-HADOOP-Build/5434//console This message is automatically generated. > GangliaContext does not work with multicast ganglia setup > --------------------------------------------------------- > > Key: HADOOP-10181 > URL: https://issues.apache.org/jira/browse/HADOOP-10181 > Project: Hadoop Common > Issue Type: Bug > Reporter: Andrew Otto > Assignee: Andrew Johnson > Priority: Minor > Labels: ganglia, hadoop, metrics, multicast > Attachments: HADOOP-10181.001.patch > > > The GangliaContext class which is used to send Hadoop metrics to Ganglia uses > a DatagramSocket to send these metrics. This works fine for Ganglia > multicast setups that are all on the same VLAN. However, when working with > multiple VLANs, a packet sent via DatagramSocket to a multicast address will > end up with a TTL of 1. Multicast TTL indicates the number of network hops > for which a particular multicast packet is valid. The packets sent by > GangliaContext do not make it to ganglia aggregrators on the same multicast > group, but in different VLANs. > To fix, we'd need a configuration property that specifies that multicast is > to be used, and another that allows setting of the multicast packet TTL. > With these set, we could then use MulticastSocket setTimeToLive() instead of > just plain ol' DatagramSocket. -- This message was sent by Atlassian JIRA (v6.3.4#6332)