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From: "Jonathan Ellis (JIRA)" <jira@apache.org>
To: commits@cassandra.apache.org
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Subject: [jira] [Updated] (CASSANDRA-8619) using CQLSSTableWriter gives
 ConcurrentModificationException
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     [ https://issues.apache.org/jira/browse/CASSANDRA-8619?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jonathan Ellis updated CASSANDRA-8619:
--------------------------------------
    Assignee: Benjamin Lerer

> using CQLSSTableWriter gives ConcurrentModificationException
> ------------------------------------------------------------
>
>                 Key: CASSANDRA-8619
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8619
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Tools
>         Environment: sun jdk 7
> linux - ubuntu
>            Reporter: Igor Berman
>            Assignee: Benjamin Lerer
>         Attachments: TimeSeriesCassandraLoaderTest.java
>
>
> Using CQLSSTableWriter gives ConcurrentModificationException 
> I'm trying to load many timeseries into cassandra 2.0.11-1
> using  'org.apache.cassandra:cassandra-all:2.0.11'
> {noformat}
> java.util.ConcurrentModificationException
> 	at java.util.TreeMap$PrivateEntryIterator.nextEntry(TreeMap.java:1115)
> 	at java.util.TreeMap$ValueIterator.next(TreeMap.java:1160)
> 	at org.apache.cassandra.db.ColumnIndex$Builder.build(ColumnIndex.java:126)
> 	at org.apache.cassandra.io.sstable.SSTableWriter.rawAppend(SSTableWriter.java:202)
> 	at org.apache.cassandra.io.sstable.SSTableWriter.append(SSTableWriter.java:187)
> 	at org.apache.cassandra.io.sstable.SSTableSimpleUnsortedWriter$DiskWriter.run(SSTableSimpleUnsortedWriter.java:215)
> schema
> CREATE TABLE test.sample (ts_id bigint, yr int, t timestamp, v double, tgs set<varchar>, PRIMARY KEY((ts_id,yr), t)) WITH CLUSTERING ORDER BY (t DESC) AND COMPRESSION = {'sstable_compression': 'LZ4Compressor'};
> statement:
> INSERT INTO  test.sample(ts_id, yr, t, v) VALUES (?,?,?,?)
> {noformat}
> with .withBufferSizeInMB(128); it happens more than with
> .withBufferSizeInMB(256);
> code based on http://planetcassandra.org/blog/using-the-cassandra-bulk-loader-updated/
> writer.addRow(tsId, year, new Date(time), value);
> Any suggestions will be highly appreciated



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