Github user poornachandra commented on a diff in the pull request:
https://github.com/apache/incubator-tephra/pull/19#discussion_r86889731
--- Diff: tephra-core/src/main/java/org/apache/tephra/util/TxUtils.java ---
@@ -149,4 +149,15 @@ private static long getMaxTTL(Map<byte[], Long>
ttlByFamily) {
public static boolean isPreExistingVersion(long version) {
return version < MAX_NON_TX_TIMESTAMP;
}
+
+ /**
+ * Returns the maximum transaction that can be removed from the invalid
list for the state represented by the given
+ * transaction.
+ */
+ public static long getPruneUpperBound(Transaction tx) {
+ long maxInvalidTx =
+ tx.getInvalids().length > 0 ?
tx.getInvalids()[tx.getInvalids().length - 1] : Transaction.NO_TX_IN_PROGRESS;
+ long firstInProgress = tx.getFirstInProgress();
+ return Math.min(maxInvalidTx, firstInProgress - 1);
--- End diff --
Good catch, updated the code to use the current read pointer in such a case
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