Hi All - this is my first post here. I've been using Cassandra for
several months now and am loving it. We are moving from Apache HBase to
Cassandra for a big data analytics platform.
I'm using java to get rows from Cassandra and very frequently get a
java.util.NoSuchElementException when iterating through a ResultSet. If
I retry this query again (often several times), it works. The debug log
on the Cassandra nodes show this message:
org.apache.cassandra.service.DigestMismatchException: Mismatch for key
DecoratedKey
My cluster looks like this:
Datacenter: datacenter1
=======================
Status=Up/Down
|/ State=Normal/Leaving/Joining/Moving
-- Address Load Tokens Owns (effective) Host
ID Rack
UN 172.16.100.224 340.5 GiB 512 50.9%
8ba646ac-2b33-49de-a220-ae9842f18806 rack1
UN 172.16.100.208 269.19 GiB 384 40.3%
4e0ba42f-649b-425a-857a-34497eb3036e rack1
UN 172.16.100.225 282.83 GiB 512 50.4%
247f3d70-d13b-4d68-9a53-2ed58e01a63e rack1
UN 172.16.110.3 409.78 GiB 768 63.2%
0abea102-06d2-4309-af36-a3163e8f00d8 rack1
UN 172.16.110.4 330.15 GiB 512 50.6%
2a5ae735-6304-4e99-924b-44d9d5ec86b7 rack1
UN 172.16.100.253 98.88 GiB 128 14.6%
6b528b0b-d7f7-4378-bba8-1857802d4f18 rack1
UN 172.16.100.254 204.5 GiB 256 30.0%
87d0cb48-a57d-460e-bd82-93e6e52e93ea rack1
I suspect this has to do with how I'm using consistency levels?
Typically I'm using ONE. I just set the dclocal_read_repair_chance to
0.0, but I'm still seeing the issue. Any help/tips?
Thank you!
-Joe Obernberger
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