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[HADOOP-14445] Delegation tokens are not shared between KMS instances - Hadoop - [issue]
...As discovered in HADOOP-14441, KMS HA using LoadBalancingKMSClientProvider do not share delegation tokens. (a client uses KMS address/port as the key for delegation token)DelegationTokenAuth...
http://issues.apache.org/jira/browse/HADOOP-14445    Author: Wei-Chiu Chuang , 2018-09-11, 17:57
[HADOOP-15696] KMS performance regression due to too many open file descriptors after Jetty migration - Hadoop - [issue]
...We recently found KMS performance regressed in Hadoop 3.0, possibly linking to the migration from Tomcat to Jetty in HADOOP-13597.Symptoms: Hadoop 3.x KMS open file descriptors quickly rises...
http://issues.apache.org/jira/browse/HADOOP-15696    Author: Wei-Chiu Chuang , 2018-09-11, 14:56
spark structured streaming jobs working in HDP2.6 fail in HDP3.0 - Hadoop - [mail # user]
...Hi Lian, I don't know much about Spark structured streaming, but judgingfrom the stacktrace, you're application was trying to accessHftpFileSystem, which is removed in Apache Hadoop 3. Most ...
   Author: Wei-Chiu Chuang , 2018-08-30, 16:44
[HADOOP-15599] Improve TrashPolicyDefault error message - Hadoop - [issue]
...Found the following warning message:2018-07-09 06:00:00,486 WARN org.apache.hadoop.fs.TrashPolicyDefault: Unexpected item in trash: /user/hue/.Trash/hue. Ignoring.However, it's not clear wha...
http://issues.apache.org/jira/browse/HADOOP-15599    Author: Wei-Chiu Chuang , 2018-08-22, 08:17
[HADOOP-15686] Supress bogus AbstractWadlGeneratorGrammarGenerator in KMS logs - Hadoop - [issue]
...After we switched underlying system of KMS from Tomcat to Jetty, we started to observe a lot of bogus messages like the follow [1]. It is harmless but very annoying. Let's suppress i...
http://issues.apache.org/jira/browse/HADOOP-15686    Author: Wei-Chiu Chuang , 2018-08-21, 01:35
[HADOOP-15487] ConcurrentModificationException resulting in Kerberos authentication error. - Hadoop - [issue]
...We found the following exception message in a NameNode log. It seems the ConcurrentModificationException caused Kerberos authentication error.It appears to be a JDK bug, similar to HADOOP-13...
http://issues.apache.org/jira/browse/HADOOP-15487    Author: Wei-Chiu Chuang , 2018-08-16, 18:45
[HADOOP-15638] KMS Accept Queue Size default changed from 500 to 128 in Hadoop 3.x - Hadoop - [issue]
...HADOOP-13597 migrated KMS from Tomcat to Jetty.In Hadoop 2.x, the Accept Queue Size default value was set by environment variable KMS_ACCEPT_QUEUE with default value 500.But after the migrat...
http://issues.apache.org/jira/browse/HADOOP-15638    Author: Wei-Chiu Chuang , 2018-08-13, 18:04
HDFS User impersonation on encrypted zone | Ranger KMS - Hadoop - [mail # user]
...Hi, this is a supported use case.Please make sure you configure the KMS proxy user correctly as well (it isseparately from HDFS proxy user settings)https://hadoop.apache.org/docs/current/had...
   Author: Wei-Chiu Chuang , 2018-08-02, 19:42
[HADOOP-15593] UserGroupInformation TGT renewer throws NPE - Hadoop - [issue]
...Found the following NPE thrown in UGI tgt renewer. The NPE was thrown within an exception handler so the original exception was hidden, though it's likely caused by expired tgt.18/07/02 10:3...
http://issues.apache.org/jira/browse/HADOOP-15593    Author: Wei-Chiu Chuang , 2018-07-31, 19:29
Hadoop impersonation not handling permissions - Hadoop - [mail # user]
...Pretty sure this is the expected behavior.From the stacktrace, you're impersonation is configured correctly (i.e. itsuccessfully perform operation on behalf of user b) the problem is yourfil...
   Author: Wei-Chiu Chuang , 2018-07-30, 21:02