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https://issues.apache.org/jira/browse/TEPHRA-216?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15862042#comment-15862042
]
ASF GitHub Bot commented on TEPHRA-216:
---------------------------------------
Github user poornachandra commented on a diff in the pull request:
https://github.com/apache/incubator-tephra/pull/34#discussion_r100648648
--- Diff:
tephra-hbase-compat-1.1-base/src/main/java/org/apache/tephra/hbase/txprune/HBaseTransactionPruningPlugin.java
---
@@ -322,6 +333,28 @@ private long computePruneUpperBound(TimeRegions
timeRegions) throws IOException
return -1;
}
+ private Map<byte[], Long> handleEmptyRegions(long
inactiveTransactionBound,
+ SortedSet<byte[]>
transactionalRegions,
+ Map<byte[], Long>
pruneUpperBoundRegions) throws IOException {
+ long inactiveTransactionBoundTime =
TxUtils.getTimestamp(inactiveTransactionBound);
+ SortedSet<byte[]> emptyRegions =
+
dataJanitorState.getEmptyRegionsAfterTime(inactiveTransactionBoundTime,
transactionalRegions);
+ LOG.debug("Got empty transactional regions for inactive transaction
bound time {}: {}",
+ inactiveTransactionBoundTime,
Iterables.transform(emptyRegions, TimeRegions.BYTE_ARR_TO_STRING_FN));
+
+ // The regions that are recorded as empty after
inactiveTransactionBoundTime will not have invalid data
+ // for transactions started before or on inactiveTransactionBoundTime.
Hence we can consider the prune upper bound
+ // for these empty regions as inactiveTransactionBound
+ Map<byte[], Long> pubWithEmptyRegions = new
TreeMap<>(Bytes.BYTES_COMPARATOR);
+ pubWithEmptyRegions.putAll(pruneUpperBoundRegions);
+ for (byte[] emptyRegion : emptyRegions) {
+ if (!pruneUpperBoundRegions.containsKey(emptyRegion)) {
+ pubWithEmptyRegions.put(emptyRegion, inactiveTransactionBound);
--- End diff --
If an empty region does not contain a prune upper bound value then we put
`inactiveTransactionBound` as its prune upper bound. How do you suggest this be
changed?
> Invalid Transaction List Pruning will not proceed if there are empty
> transactional tables
> -----------------------------------------------------------------------------------------
>
> Key: TEPHRA-216
> URL: https://issues.apache.org/jira/browse/TEPHRA-216
> Project: Tephra
> Issue Type: Sub-task
> Affects Versions: 0.11.0-incubating
> Reporter: Gokul Gunasekaran
> Assignee: Poorna Chandra
>
> Since empty table/regions might not undergo major compaction, the prune upper
> bound of these regions will never have a value and thus will limit the
> progress of invalid list transaction pruning.
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