HADOOP-13812. Upgrade Tomcat to 6.0.48. Contributed by John Zhuge.

hadoop-common-project/hadoop-kms/src/site/markdown/index.md.vm

@@ -298,6 +298,8 @@ The answer to "What is your first and last name?" (i.e. "CN") must be the hostna
 
 NOTE: You need to restart the KMS for the configuration changes to take effect.
 
+NOTE: Some old SSL clients may use weak ciphers that are not supported by the KMS server. It is recommended to upgrade the SSL client.
+
 $H4 ACLs (Access Control Lists)
 
 KMS supports ACLs (Access Control Lists) for fine-grained permission control.

hadoop-hdfs-project/hadoop-hdfs-httpfs/src/site/markdown/ServerSetup.md.vm

@@ -119,3 +119,5 @@ The answer to "What is your first and last name?" (i.e. "CN") must be the hostna
 Start HttpFS. It should work over HTTPS.
 
 Using the Hadoop `FileSystem` API or the Hadoop FS shell, use the `swebhdfs://` scheme. Make sure the JVM is picking up the truststore containing the public key of the SSL certificate if using a self-signed certificate.
+
+NOTE: Some old SSL clients may use weak ciphers that are not supported by the HttpFS server. It is recommended to upgrade the SSL client.

hadoop-project/pom.xml

@@ -85,7 +85,7 @@
     <curator.version>2.7.1</curator.version>
     <findbugs.version>3.0.0</findbugs.version>
 
-    <tomcat.version>6.0.44</tomcat.version>
+    <tomcat.version>6.0.48</tomcat.version>
     <guice.version>4.0</guice.version>
     <joda-time.version>2.9.4</joda-time.version>