Description
Hi Hadoop developers,
Trying to do some quick tests with erasure coding feature and ran into a issue on adding policies. The example on adding erasure code policies with provided template failed:
./bin/hdfs ec -addPolicies -policyFile /tmp/user_ec_policies.xml.template
2019-07-30 10:35:16,447 INFO util.ECPolicyLoader: Loading EC policy file /tmp/user_ec_policies.xml.template
Add ErasureCodingPolicy XOR-2-1-128k succeed.
Add ErasureCodingPolicy RS-LEGACY-12-4-256k failed and error message is Codec name RS-legacy is not supported
The issue seems due to be the mismatching codec(upper case vs lower case). The codec is in upper case in the example template[1] while all available codecs are lower case[2]. A way to fix maybe just converting the codec to lower case when parsing the policy schema. Also attached a simple patch here.
Thanks, -yuan