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https://issues.apache.org/jira/browse/CASSANDRA-12715?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15527705#comment-15527705
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Dikang Gu commented on CASSANDRA-12715:
---------------------------------------

[~blambov], I modified current unit test a bit, so that it can cover this case 
as well. Here is the new patch, 
https://github.com/DikangGu/cassandra/commit/57b6a000f39315b027ffe4caa499806c17c33240

> Fix exceptions with the new vnode allocation.
> ---------------------------------------------
>
>                 Key: CASSANDRA-12715
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-12715
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Dikang Gu
>            Assignee: Dikang Gu
>             Fix For: 3.0.x, 3.x
>
>
> Problem: see exceptions when bootstrapping nodes using the new vnode 
> allocation algorithm. I'm able to reproduce it in trunk as well:
> {code}
> INFO  [main] 2016-09-26 15:36:54,978 StorageService.java:1437 - JOINING: 
> calculation complete, ready to bootstrap
> INFO  [main] 2016-09-26 15:36:54,978 StorageService.java:1437 - JOINING: 
> getting bootstrap token
> ERROR [main] 2016-09-26 15:36:54,989 CassandraDaemon.java:752 - Exception 
> encountered during startup
> java.lang.AssertionError: null
>         at 
> org.apache.cassandra.locator.TokenMetadata.getTopology(TokenMetadata.java:1209)
>  ~[main/:na]
>         at 
> org.apache.cassandra.dht.tokenallocator.TokenAllocation.getStrategy(TokenAllocation.java:201)
>  ~[main/:na]
>         at 
> org.apache.cassandra.dht.tokenallocator.TokenAllocation.getStrategy(TokenAllocation.java:164)
>  ~[main/:na]
>         at 
> org.apache.cassandra.dht.tokenallocator.TokenAllocation.allocateTokens(TokenAllocation.java:54)
>  ~[main/:na]
>         at 
> org.apache.cassandra.dht.BootStrapper.allocateTokens(BootStrapper.java:207) 
> ~[main/:na]
>         at 
> org.apache.cassandra.dht.BootStrapper.getBootstrapTokens(BootStrapper.java:174)
>  ~[main/:na]
>         at 
> org.apache.cassandra.service.StorageService.joinTokenRing(StorageService.java:929)
>  ~[main/:na]
>         at 
> org.apache.cassandra.service.StorageService.initServer(StorageService.java:697)
>  ~[main/:na]
>         at 
> org.apache.cassandra.service.StorageService.initServer(StorageService.java:582)
>  ~[main/:na]
>         at 
> org.apache.cassandra.service.CassandraDaemon.setup(CassandraDaemon.java:392) 
> [main/:na]
>         at 
> org.apache.cassandra.service.CassandraDaemon.activate(CassandraDaemon.java:601)
>  [main/:na]
>         at 
> org.apache.cassandra.service.CassandraDaemon.main(CassandraDaemon.java:735) 
> [main/:na]
> {code}



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