prasadkulkarni0711 created MESOS-10217:
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             Summary: Mesos slave fails to connect after enabling ssl
                 Key: MESOS-10217
                 URL: https://issues.apache.org/jira/browse/MESOS-10217
             Project: Mesos
          Issue Type: Bug
          Components: agent
    Affects Versions: 1.9.0
            Reporter: prasadkulkarni0711


Version:
mesos 1.9.0-2.0.1.ubuntu1604

After enabling ssl on master and slave by setting the following variables:
LIBPROCESS_SSL_ENABLED=1
LIBPROCESS_SSL_KEY_FILE=/etc/mesos/conf/ssl/server.key
LIBPROCESS_SSL_CERT_FILE=/etc/mesos/conf/ssl/server.pem
LIBPROCESS_SSL_REQUIRE_CERT=false
LIBPROCESS_SSL_VERIFY_SERVER_CERT=false
LIBPROCESS_SSL_REQUIRE_CLIENT_CERT=false
LIBPROCESS_SSL_HOSTNAME_VALIDATION_SCHEME=openssl
LIBPROCESS_SSL_VERIFY_CERT=false
LIBPROCESS_SSL_CA_DIR=/etc/mesos/conf/ssl
LIBPROCESS_SSL_CA_FILE=/etc/mesos/conf/ssl/ca.pem
LIBPROCESS_SSL_SUPPORT_DOWNGRADE=false
LIBPROCESS_SSL_VERIFY_IPADD=false

The slave fails to connect to the master. Error in logs:
Failed to accept socket: Failed accept: connection error: error:1407609C:SSL 
routines:SSL23_GET_CLIENT_HELLO:http request

The connectivity works after setting:
LIBPROCESS_SSL_SUPPORT_DOWNGRADE=true

But then on the mesos UI the sandbox for the task fails to open with following 
error:
Potential reasons:
 * The agent is not accessible
 * The agent timed out or went offline



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