Github user keith-turner commented on the issue:
https://github.com/apache/accumulo/pull/120
I am trying to upgrade from 1.7.1 to 1.8.0-SNAPSHOT (with this commit
merged into 1.8.0-SNAP). While doing this I am seeing the tserver and master
fail to start with the following error. I am going to work through this.
```
2016-07-12 11:55:35,628 [tserver.TabletServer] ERROR: Uncaught exception in
TabletServer.main, exiting
java.lang.RuntimeException: This version of accumulo (1.8.0-SNAPSHOT) is
not compatible with files stored using data version 7
at org.apache.accumulo.server.Accumulo.init(Accumulo.java:182)
at
org.apache.accumulo.tserver.TabletServer.main(TabletServer.java:2908)
at
org.apache.accumulo.tserver.TServerExecutable.execute(TServerExecutable.java:33)
at org.apache.accumulo.start.Main$1.run(Main.java:120)
at java.lang.Thread.run(Thread.java:745)
```
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