[ 
https://issues.apache.org/jira/browse/CASSANDRA-9676?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Vladimir Kuptsov updated CASSANDRA-9676:
----------------------------------------
    Description: 
I've the same issue as described in 
https://issues.apache.org/jira/browse/CASSANDRA-9071
As I can understand it happens during the buffer flush, which size regulated by 
the withBufferSizeInMB() method call in
{code} 
    CQLSSTableWriter
      .builder()
      .inDirectory(createOutputDir())
      .forTable(metadata.schema)
      .using(insertStatement)
      .withBufferSizeInMB(128)
    .build()
{code}
For example, when I use 128 Mb buffer, it fails after 210 000 csv lines 
processed. On 3Mb buffer it fails after 10 000 lines.

  was:
I've the same issue as described in 
https://issues.apache.org/jira/browse/CASSANDRA-9071
As I can understand it happens during the buffer flush, which regulated with 
the withBufferSizeInMB() method call in
{code} 
    CQLSSTableWriter
      .builder()
      .inDirectory(createOutputDir())
      .forTable(metadata.schema)
      .using(insertStatement)
      .withBufferSizeInMB(128)
    .build()
{code}
For example, when I use 128 Mb buffer, it fails after 210 000 csv lines 
processed. On 3Mb buffer it fails after 10 000 lines.


> CQLSSTableWriter gives java.lang.AssertionError: Empty partition in C* 2.0.15
> -----------------------------------------------------------------------------
>
>                 Key: CASSANDRA-9676
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-9676
>             Project: Cassandra
>          Issue Type: Bug
>         Environment: cass 2.0.15
>            Reporter: Vladimir Kuptsov
>
> I've the same issue as described in 
> https://issues.apache.org/jira/browse/CASSANDRA-9071
> As I can understand it happens during the buffer flush, which size regulated 
> by the withBufferSizeInMB() method call in
> {code} 
>     CQLSSTableWriter
>       .builder()
>       .inDirectory(createOutputDir())
>       .forTable(metadata.schema)
>       .using(insertStatement)
>       .withBufferSizeInMB(128)
>     .build()
> {code}
> For example, when I use 128 Mb buffer, it fails after 210 000 csv lines 
> processed. On 3Mb buffer it fails after 10 000 lines.



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