Github user anew commented on the issue:
https://github.com/apache/incubator-tephra/pull/19
Question: Suppose I start a transaction, which times out, and therefore
goes into the invalid list. A little later HBase performs a major compaction.
This transaction and all its writes are removed from the table by the
DataJanitor. A little later TxManager prunes its invalid transactions, and
because this tx has been removed from HBase, it removes it from the invalid
list.
The problem is if the program that started the transaction is still
running. What if it performs another write after the transaction pruning? This
would be an invalid version, but now it has been pruned from the invalid list
and becomes visible.
Isn't that a problem?
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