Matteo Bertozzi created HBASE-16487:
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Summary: Remove Class.fromName("..PrefixTreeCodec") from
TableMapReduceUtil addHBaseDependencyJars
Key: HBASE-16487
URL: https://issues.apache.org/jira/browse/HBASE-16487
Project: HBase
Issue Type: Bug
Components: mapreduce
Affects Versions: 1.2.2, 2.0.0, 1.3.0, 1.4.0
Reporter: Matteo Bertozzi
HBASE-15152 included the prefix tree module as dependency to
TableMapReduceUtil. but the hardcoded string of the class name was wrong.
HBASE-16360 fixed the hardcoded string.
but, I was looking at the comment above and I can't figure out where is the
circular dependency.
{code}
// PrefixTreeCodec is part of the hbase-prefix-tree module. If not included in
MR jobs jar
// dependencies, MR jobs that write encoded hfiles will fail.
// We used reflection here so to prevent a circular module dependency.
// TODO - if we extract the MR into a module, make it depend on
hbase-prefix-tree
{code}
from the pom.xml of the prefix-tree module I don't see hbase-server. but I can
see prefix-tree module in the hbase-server/pom.xml. the TableMapReduceUtil is
in hbase-server.. so in theory we don't have any circular dependency.
we can just probably drop all that try/catch block with the Class.forName() and
just simply use org.apache.hadoop.hbase.codec.prefixtree.PrefixTreeCodec as we
do for the others.
(or at least we should end up with a test to cover the that Class.fromName() in
case we rename the PrefixTreeCodec or the namespace in the future and forget to
update this reference)
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