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From Patrik Modesto <patrik.mode...@gmail.com>
Subject problem with bootstrap
Date Tue, 08 Mar 2011 15:23:02 GMT
Hi,

I've small test cluster, 2 servers, both running successfully
cassandra 0.7.3. I've three keyspaces, two with RF1, one with RF3. Now
when I try to bootstrap 3rd server (empty initial_token,
auto_bootstrap: true), I get this exception on the new server.

 INFO 23:13:43,229 Joining: getting bootstrap token
 INFO 23:13:43,258 New token will be
127097301048222781806986236020167142093 to assume load from
/10.0.18.99
 INFO 23:13:43,259 switching in a fresh Memtable for LocationInfo at
CommitLogContext(file='/mnt/disk8/cassandra/data/CommitLog-1299622332896.log',
position=1578072)
 INFO 23:13:43,259 Enqueuing flush of
Memtable-LocationInfo@1526249359(106 bytes, 3 operations)
 INFO 23:13:43,259 Writing Memtable-LocationInfo@1526249359(106 bytes,
3 operations)
 INFO 23:13:43,276 Completed flushing
/mnt/disk3/cassandra/data/system/LocationInfo-f-2-Data.db (211 bytes)
 INFO 23:13:43,277 Joining: sleeping 30000 ms for pending range setup
 INFO 23:14:13,277 Bootstrapping
java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.commons.daemon.support.DaemonLoader.load(DaemonLoader.java:160)
Caused by: java.lang.IllegalStateException: replication factor (3)
exceeds number of endpoints (2)
        at org.apache.cassandra.locator.SimpleStrategy.calculateNaturalEndpoints(SimpleStrategy.java:60)
        at org.apache.cassandra.locator.AbstractReplicationStrategy.getRangeAddresses(AbstractReplicationStrategy.java:212)
        at org.apache.cassandra.dht.BootStrapper.getRangesWithSources(BootStrapper.java:198)
        at org.apache.cassandra.dht.BootStrapper.bootstrap(BootStrapper.java:83)
        at org.apache.cassandra.service.StorageService.bootstrap(StorageService.java:525)
        at org.apache.cassandra.service.StorageService.joinTokenRing(StorageService.java:453)
        at org.apache.cassandra.service.StorageService.initServer(StorageService.java:403)
        at org.apache.cassandra.service.AbstractCassandraDaemon.setup(AbstractCassandraDaemon.java:194)
        at org.apache.cassandra.service.AbstractCassandraDaemon.init(AbstractCassandraDaemon.java:217)
        ... 5 more
Cannot load daemon
Service exit with a return value of 3

On the other servers I get:

ERROR 15:54:24,670 Error in ThreadPoolExecutor
java.lang.IllegalStateException: replication factor (3) exceeds number
of endpoints (2)
        at org.apache.cassandra.locator.SimpleStrategy.calculateNaturalEndpoints(SimpleStrategy.java:60)
        at org.apache.cassandra.service.StorageService.calculatePendingRanges(StorageService.java:929)
        at org.apache.cassandra.service.StorageService.calculatePendingRanges(StorageService.java:895)
        at org.apache.cassandra.service.StorageService.handleStateLeaving(StorageService.java:797)
        at org.apache.cassandra.service.StorageService.onChange(StorageService.java:651)
        at org.apache.cassandra.gms.Gossiper.doNotifications(Gossiper.java:763)
        at org.apache.cassandra.gms.Gossiper.applyApplicationStateLocally(Gossiper.java:753)
        at org.apache.cassandra.gms.Gossiper.applyStateLocally(Gossiper.java:670)
        at org.apache.cassandra.gms.GossipDigestAckVerbHandler.doVerb(GossipDigestAckVerbHandler.java:68)
        at org.apache.cassandra.net.MessageDeliveryTask.run(MessageDeliveryTask.java:72)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
        at java.lang.Thread.run(Thread.java:662)
ERROR 15:54:24,672 Fatal exception in thread Thread[GossipStage:1,5,main]
java.lang.IllegalStateException: replication factor (3) exceeds number
of endpoints (2)
        at org.apache.cassandra.locator.SimpleStrategy.calculateNaturalEndpoints(SimpleStrategy.java:60)
        at org.apache.cassandra.service.StorageService.calculatePendingRanges(StorageService.java:929)
        at org.apache.cassandra.service.StorageService.calculatePendingRanges(StorageService.java:895)
        at org.apache.cassandra.service.StorageService.handleStateLeaving(StorageService.java:797)
        at org.apache.cassandra.service.StorageService.onChange(StorageService.java:651)
        at org.apache.cassandra.gms.Gossiper.doNotifications(Gossiper.java:763)
        at org.apache.cassandra.gms.Gossiper.applyApplicationStateLocally(Gossiper.java:753)
        at org.apache.cassandra.gms.Gossiper.applyStateLocally(Gossiper.java:670)
        at org.apache.cassandra.gms.GossipDigestAckVerbHandler.doVerb(GossipDigestAckVerbHandler.java:68)
        at org.apache.cassandra.net.MessageDeliveryTask.run(MessageDeliveryTask.java:72)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
        at java.lang.Thread.run(Thread.java:662)


Removing the keyspace with RF3 fixed the problem and boostrap went
well, but why is there a problem with less nodes than servers? I can
imagine a situation when I would need to remove nodes from cluster and
get to the point of having less servers than is the maximum RF used.
I'd then be unable to bootstrap the new servers to the cluster.
Removing the keyspace is not an option in production environment.

Thanks,
Patrik

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