[GitHub] [accumulo] keith-turner commented on issue #1139: Ensure 2.0.0 upgrade works properly when 1.9 tservers are still running

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keith-turner commented on issue #1139: Ensure 2.0.0 upgrade works properly when 1.9 tservers are still running
URL: https://github.com/apache/accumulo/issues/1139#issuecomment-488047585
 
 
   I ran this experiment and the 2.0 master was unable to authenticate with the 1.9 tserver.  I dug into why and its because the system token hashes all instance properties (including default values) to generate the system password.  Accumulo 2.0 has a new instance property `instance.crypto.service` that is not present in 1.9.  This new property is what caused authentication to fail.
   
   There is also a wire version constant that is included in the system token.  I think it may make sense to bump this.

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