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From "Xu Zhongxing" <xu_zhong_x...@163.com>
Subject nodetool compact cannot remove tombstone in system keyspace
Date Tue, 13 Jan 2015 04:27:01 GMT
Hi,


When I connect to C* with driver, I found some warnings in the log (I increased tombstone_failure_threshold
to 150000 to see the warning)


WARN [ReadStage:5] 2015-01-13 12:21:14,595 SliceQueryFilter.java (line 225) Read 34188 live
and 104186 tombstoned cells in system.schema_columns (see tombstone_warn_threshold). 2147483387
columns was requested, slices=[-], delInfo={deletedAt=-9223372036854775808, localDeletion=2147483647}
 WARN [ReadStage:5] 2015-01-13 12:21:15,562 SliceQueryFilter.java (line 225) Read 34209 live
and 104247 tombstoned cells in system.schema_columns (see tombstone_warn_threshold). 2147449199
columns was requested, slices=[-], delInfo={deletedAt=-9223372036854775808, localDeletion=2147483647}


I run the command:
nodetool compact system 


But the tombstone number does not decrease. I still see the warnings with the exact number
of tombstones.
Why is this happening? What should I do to remove the tombstones in the system keyspace?
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