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From Jan Algermissen <>
Subject Meaning of "java.lang.AssertionError: incorrect row data size ..."
Date Sun, 08 Sep 2013 13:21:29 GMT

I keep seeing the error message below in my log files. Can someone explain what it means and
how to prevent it?

 INFO [OptionalTasks:1] 2013-09-07 13:46:27,160 (line 58) flushing high-traffic
column family CFS(Keyspace='pr
oducts', ColumnFamily='product') (estimated 3145728 bytes)
ERROR [CompactionExecutor:2] 2013-09-07 13:46:27,163 (line 192) Exception
in thread Thread[CompactionExecutor
java.lang.AssertionError: incorrect row data size 132289 written to /var/lib/cassandra/data/products/product/products-product-tmp-ic-177-Data.db;
correct is 132382

I am doing high frequency insert in a 3Node , each 2GB-RAM cluster and experience crashing
C* processes.
My write pattern is a series of 70-col rows with 5-20 consecutive rows pertaining to the same
wide row. Mabe that is causing too frequent compactions with high volume?.

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