Michael Gummelt created SPARK-17002:
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Summary: Document that spark.ssl.protocol. is required for SSL
Key: SPARK-17002
URL: https://issues.apache.org/jira/browse/SPARK-17002
Project: Spark
Issue Type: Improvement
Components: Spark Core
Affects Versions: 2.0.0, 1.6.2
Reporter: Michael Gummelt
cc [~jlewandowski]
I was trying to start the Spark master. When setting
{{spark.ssl.enabled=true}}, but failing to set {{spark.ssl.protocol}}, I get
this none-too-helpful error message:
{code}
16/08/10 15:17:50 INFO SecurityManager: SecurityManager: authentication
disabled; ui acls disabled; users with view permissions: Set(mgummelt); users
with modify permissions: Set(mgummelt)
16/08/10 15:17:50 WARN SecurityManager: Using 'accept-all' trust manager for
SSL connections.
Exception in thread "main" java.security.KeyManagementException: Default
SSLContext is initialized automatically
at
sun.security.ssl.SSLContextImpl$DefaultSSLContext.engineInit(SSLContextImpl.java:749)
at javax.net.ssl.SSLContext.init(SSLContext.java:282)
at org.apache.spark.SecurityManager.<init>(SecurityManager.scala:284)
at
org.apache.spark.deploy.master.Master$.startRpcEnvAndEndpoint(Master.scala:1121)
at org.apache.spark.deploy.master.Master$.main(Master.scala:1106)
at org.apache.spark.deploy.master.Master.main(Master.scala)
{code}
We should document that {{spark.ssl.protocol}} is required, and throw a more
helpful error message when it isn't set. In fact, we should remove the
`getOrElse` here:
https://github.com/apache/spark/blob/master/core/src/main/scala/org/apache/spark/SecurityManager.scala#L285,
since the following line fails when the protocol is set to "Default"
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