Hi,
I ran the following Java snippet that creates a bucket, stores a key/value
pair in it, deletes the key, and adds a new value for that same key. The
n-value is 3 and all r- and w-values are also set to 3 to ensure full
consistency (for testing only). Here's the code:
public static void main(String[] args) throws Exception {
IRiakClient riak = RiakFactory.pbcClient();
try {
// store an object in a new bucket
Bucket testBucket =
riak.createBucket("testBucket").nVal(3).allowSiblings(true).execute();
testBucket.store("key", "value1").w(3).execute();
System.out.println(testBucket.fetch("key").r(3).execute().getValueAsString());
// prints 'value1'
// now delete it and store another object with the same key
testBucket.delete("key").r(3).w(3).execute();
testBucket.store("key", "value2").w(3).execute();
System.out.println(testBucket.fetch("key").r(3).execute().getValueAsString());
// throws 'UnresolvedConflictException: Siblings found'
} finally {
riak.shutdown();
}
}
As you can see by the comment I have added to the code fetching the key a
second time should, in my opinion, return the new value, but it fails
because there are siblings. Maybe I didn't fully understand how sibling
handling works, but I don't see how there can possibly be any siblings
given that r and w are 3. Any pointers? I tried the LevelDB and memory
backends, same result.
Thanks,
Kaspar
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