[jira] [Created] (HDFS-12087) The error message is not friendly when set a path with the policy not enabled

["lufei (JIRA)" <ji...@apache.org>]

lufei created HDFS-12087:
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             Summary: The error message is not friendly when set a path with the policy not enabled
                 Key: HDFS-12087
                 URL: https://issues.apache.org/jira/browse/HDFS-12087
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: hdfs
    Affects Versions: 3.0.0-alpha3
            Reporter: lufei
            Assignee: lufei


First user add a policy by -addPolicies command but not enabled, then user set a path with this policy. The error message displayed as below:
{color:#707070}RemoteException: Policy 'XOR-2-1-128k' does not match any enabled erasure coding policies: []. The set of enabled erasure coding policies can be configured at 'dfs.namenode.ec.policies.enabled'.{color}

The policy 'XOR-2-1-128k' is added by user but not be enabled.The error message is not promot user to enable the policy first.I think the error message may be better as below:
{color:#707070}RemoteException: Policy 'XOR-2-1-128k' does not match any enabled erasure coding policies: []. The set of enabled erasure coding policies can be configured at 'dfs.namenode.ec.policies.enabled' or enable the policy by '-enablePolicy' EC command before.{color}



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