Github user joshelser commented on a diff in the pull request:
https://github.com/apache/accumulo/pull/224#discussion_r106811796
--- Diff:
core/src/main/java/org/apache/accumulo/core/client/summary/Summary.java ---
@@ -78,27 +80,38 @@ public long getLarge() {
}
/**
+ * @return The number of files that were deleted after the summary
retrieval operations started. This is a rare race condition where a compaction
causes a
+ * file to be deleted while retrieving summaries. When this
happens, the file that replaced the deleted file can not be used because it may
contain
+ * duplication summary information for other files. Avoiding
this race condition would be expensive, so reporting it was chosen. If this
condition
+ * must be avoided, then compactions must be stopped.
Compactions could be stopped on a cloned table to avoid this.
+ */
+ public long getDeleted() {
+ return deleted;
--- End diff --
Is this onerous to compute? If this is rare and there is a workaround, I
could see keeping this from public API. If it's not bad to compute/track, it's
not an issue.
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