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[HADOOP-8410] SPNEGO filter should have better error messages when not fully configured - Hadoop - [issue]
...I upgraded to a build which includes SPNEGO, but neglected to configure  dfs.web.authentication.kerberos.principal. This resulted in the following error:12/05/18 14:46:20 INFO server.Ke...
http://issues.apache.org/jira/browse/HADOOP-8410    Author: Todd Lipcon, 2012-11-16, 23:22
Re: Why don't the ipc Server use ArrayBlockingQueue for callQueue? - Hadoop - [mail # dev]
...Hi Luoli  Why would it be more efficient? When suggesting an improvement, it would be good to back it up with your reasoning.  -Todd  On Wed, Oct 31, 2012 at 1:19 AM, 罗李  ...
   Author: Todd Lipcon, 2012-10-31, 18:03
[HADOOP-8929] Add toString, other improvements for SampleQuantiles - Hadoop - [issue]
...The new SampleQuantiles class is useful in the context of benchmarks, but currently there is no way to print it out outside the context of a metrics sink. It would be nice to have a convenie...
http://issues.apache.org/jira/browse/HADOOP-8929    Author: Todd Lipcon, 2012-10-17, 14:21
[HADOOP-7149] Topology script should have some kind of timeout - Hadoop - [issue]
...We've seen an issue where a custom topology script was hanging for some external reason. This caused the NN to block during startup without any kind of clear indication what was going on.We ...
http://issues.apache.org/jira/browse/HADOOP-7149    Author: Todd Lipcon, 2012-10-15, 10:54
[HADOOP-8894] GenericTestUtils.waitFor should dump thread stacks on timeout - Hadoop - [issue]
...Many tests use this utility to wait for a condition to become true. In the event that it times out, we should dump all the thread stack traces, in case the timeout was due to a deadlock. Thi...
http://issues.apache.org/jira/browse/HADOOP-8894    Author: Todd Lipcon, 2012-10-09, 15:00
[HADOOP-7154] Should set MALLOC_ARENA_MAX in hadoop-config.sh - Hadoop - [issue]
...New versions of glibc present in RHEL6 include a new arena allocator design. In several clusters we've seen this new allocator cause huge amounts of virtual memory to be used, since when mul...
http://issues.apache.org/jira/browse/HADOOP-7154    Author: Todd Lipcon, 2012-10-03, 05:07
[HADOOP-7317] RPC.stopProxy doesn't actually close proxy - Hadoop - [issue]
...Discovered while investigating HDFS-1965, it turns out that the reference-counting done in WritableRpcEngine.ClientCache doesn't map one-to-one with open TCP connections. This means that it'...
http://issues.apache.org/jira/browse/HADOOP-7317    Author: Todd Lipcon, 2012-09-26, 20:15
[HADOOP-5640] Allow ServicePlugins to hook callbacks into key service events - Hadoop - [issue]
...HADOOP-5257 added the ability for NameNode and DataNode to start and stop ServicePlugin implementations at NN/DN start/stop. However, this is insufficient integration for some common use cas...
http://issues.apache.org/jira/browse/HADOOP-5640    Author: Todd Lipcon, 2012-09-21, 01:24
[HADOOP-8786] HttpServer continues to start even if AuthenticationFilter fails to init - Hadoop - [issue]
...As seen in HDFS-3904, if the AuthenticationFilter fails to initialize, the web server will continue to start up. We need to check for context initialization errors after starting the server....
http://issues.apache.org/jira/browse/HADOOP-8786    Author: Todd Lipcon, 2012-09-17, 20:12
Re: Test timeouts - Hadoop - [mail # dev]
...On Fri, Sep 14, 2012 at 11:23 AM, Aaron T. Myers  wrote:  I'd go one step further: If you add any test that isn't a true "unit" test (ie it relies on any mulithreading, either expl...
   Author: Todd Lipcon, 2012-09-14, 20:27
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