Hi, The PR 521 <https://github.com/apache/apex-malhar/pull/521> for APEXMALHAR-2366, <https://issues.apache.org/jira/browse/APEXMALHAR-2366> uses a modified version of a utility class available in hadoop, here <https://github.com/apache/hadoop/blob/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/bloom/BloomFilter.java>. This utility carries two licences, one a regular one from ASF and a second one from European Commission (EC). Both are listed in the source and the EC one is listed in the hadoop project LICENSE file as well, here <https://github.com/apache/hadoop/blob/trunk/LICENSE.txt>.
Before you ask, I see that there were discussions on the PR on looking for suitable alternatives and this was still the outcome. I was not a party to those discussions and just helping bring it to a conclusion as the original author is no longer engaged with it. I think it should be safe to include it following the same model hadoop is following in including the license in the source code and the project LICENSE file. I wanted to get the feedback from the community as well. Thanks
