Young Han created GIRAPH-967:
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Summary: GIRAPH-931 (Strongly Connected Components) bug fix
Key: GIRAPH-967
URL: https://issues.apache.org/jira/browse/GIRAPH-967
Project: Giraph
Issue Type: Bug
Components: examples
Reporter: Young Han
Priority: Minor
GIRAPH-931, which provides an implementation of strongly connected components
(SCC), uses the non-commutative BooleanOverwriteAggregator. This causes a race
condition between workers, leading to incorrect results when increasing the
number of workers. For example, the amazon0505 graph from SNAP will give
different (incorrect) results with 8 workers compared to 1.
The fix uses BooleanOrAggregator instead of BooleanOverwriteAggregator.
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