keith-turner opened a new issue, #3527:
URL: https://github.com/apache/accumulo/issues/3527
In #3513 a new class named SelectedFiles was added. This class contains a
fate transaction id and a set of stored tablet files. The class represents the
set of files selected in a tablet for a user initiated compaction. In #3513 a
new method named requireSame for checking if something in a tablet is the same
via conditional mutation was added. The new requireSame method enables the
following
1. Read a tablets selected files, files, and compacting files
2. Add updates to a mutation based on examining the above three sets
3. Add a condition to the mutation that files, selected files, and
compacting files must be same
For step 3 above code currently compare the serialized version of the
SelectedFiles object with what is in the metadata table via a condition on the
mutation. Therefore it extremely important that the serializtion is
deterministic for the same input data and that there are unit test for this.
In [this
comment](https://github.com/apache/accumulo/pull/3513/files#r1238442161) it was
suggested that TypeAdapter could be used to achieve serialization that results
in a comparable string.
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