[jira] [Created] (CASSANDRA-8952) Remove transient RandomAccessFile usage

["Joshua McKenzie (JIRA)" <ji...@apache.org>]

Joshua McKenzie created CASSANDRA-8952:
------------------------------------------

             Summary: Remove transient RandomAccessFile usage
                 Key: CASSANDRA-8952
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8952
             Project: Cassandra
          Issue Type: Improvement
          Components: Core
            Reporter: Joshua McKenzie
            Assignee: Joshua McKenzie
            Priority: Minor
             Fix For: 3.0


There are a few places within the code base where we use a RandomAccessFile transiently to either grab fd's or channels for other operations. This is prone to access violations on Windows (see CASSANDRA-4050 and CASSANDRA-8709) - while these usages don't appear to be causing issues at this time there's no reason to keep them. The less RandomAccessFile usage in the code-base the more stable we'll be on Windows.

[SSTableReader.dropPageCache|https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/io/sstable/format/SSTableReader.java#L2021]
* Used to getFD, have FileChannel version

[FileUtils.truncate|https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/io/util/FileUtils.java#L188]
* Used to get file channel for channel truncate call. Only use is in index file close so channel truncation down-only is acceptable.

[MMappedSegmentedFile.createSegments|https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/io/util/MmappedSegmentedFile.java#L196]
* Used to get file channel for mapping.

Keeping these in a single ticket as all three should be fairly trivial refactors.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)