Xiao Chen created HADOOP-12901:
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Summary: Add warning log when KMSClientProvider cannot create a
connection to the KMS server
Key: HADOOP-12901
URL: https://issues.apache.org/jira/browse/HADOOP-12901
Project: Hadoop Common
Issue Type: Improvement
Reporter: Xiao Chen
Assignee: Xiao Chen
Priority: Minor
Currently when failed to connect, one can only see logs at debug level with a
vague {{SocketTimeoutException}}. (Luckily in the env I saw this, HADOOP-10015
was not present, so the last WARN log was printed.)
{noformat}
2015-12-17 12:28:01,410 DEBUG org.apache.hadoop.security.UserGroupInformation:
PrivilegedAction as:hdfs (auth:SIMPLE)
from:org.apache.hadoop.crypto.key.kms.KMSClientProvider.createConnection(KMSClientProvider.java:477)
2015-12-17 12:28:01,469 WARN org.apache.hadoop.security.UserGroupInformation:
PriviledgedActionException as:hdfs (auth:SIMPLE)
cause:java.net.SocketTimeoutException: connect timed out
{noformat}
The issue was then fixed by opening up the KMS server port.
This jira is to propose we add specific loggings in this case, to help user
easily identify the problem.
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