Github user StevenMPhillips commented on a diff in the pull request:
https://github.com/apache/drill/pull/454#discussion_r58107846
--- Diff:
exec/java-exec/src/main/java/org/apache/drill/exec/physical/impl/xsort/ExternalSortBatch.java
---
@@ -110,11 +111,12 @@
private LinkedList<BatchGroup> batchGroups = Lists.newLinkedList();
private LinkedList<BatchGroup> spilledBatchGroups =
Lists.newLinkedList();
private SelectionVector4 sv4;
- private FileSystem fs;
+ private static FileSystem fs;
--- End diff --
I agree with Jacques, except I would probably have one directory per sort
operator in a fragment, rather one per fragment. This way the ExternalSort
operator would be responsible for cleaning it up, and we wouldn't have to
manage it at the Fragment level.
To clarify, right now the spill files for a sort go in a directory with the
path:
<root spill dir>/<query_id>/<major_frag_id>/<minor_frag_id>/<operator_id>/
Instead we should make it:
<root spill dir>/<query_id>_<major_frag_id>_<minor_frag_id>_<operator_id>/
That way, the sort operator itself will be able to cleanup its own spill
directory, and there won't be any empty directories left over.
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