Github user rmetzger commented on the pull request:
https://github.com/apache/incubator-flink/pull/78#issuecomment-50237717
Thank you for your pull request!
Travis indicates that your code is not compliant to our coding guidelines
(http://flink.incubator.apache.org/docs/0.6-SNAPSHOT/coding_guidelines.html):
https://s3.amazonaws.com/archive.travis-ci.org/jobs/30827003/log.txt
The problems are listed here
```
[INFO] There are 18 checkstyle errors.
[ERROR] PiEstimation.java[26:n/a] Using the '.*' form of import should be
avoided - org.apache.flink.api.java.functions.*.
[ERROR] PiEstimation.java[53:n/a] Line has leading space characters;
indentation should be performed with tabs only.
[ERROR] PiEstimation.java[54:n/a] Line has leading space characters;
indentation should be performed with tabs only.
[ERROR] PiEstimation.java[55:n/a] Line has leading space characters;
indentation should be performed with tabs only.
[ERROR] PiEstimation.java[56:n/a] Line has leading space characters;
indentation should be performed with tabs only.
[ERROR] PiEstimation.java[57:n/a] Line has leading space characters;
indentation should be performed with tabs only.
[ERROR] PiEstimation.java[58:n/a] Line has leading space characters;
indentation should be performed with tabs only.
[ERROR] PiEstimation.java[61:n/a] Line has leading space characters;
indentation should be performed with tabs only.
[ERROR] PiEstimation.java[62:n/a] Line has leading space characters;
indentation should be performed with tabs only.
[ERROR] PiEstimation.java[65:n/a] Line has leading space characters;
indentation should be performed with tabs only.
[ERROR] PiEstimation.java[66:n/a] Line has leading space characters;
indentation should be performed with tabs only.
[ERROR] PiEstimation.java[67:n/a] Line has leading space characters;
indentation should be performed with tabs only.
[ERROR] PiEstimation.java[68:n/a] Line has leading space characters;
indentation should be performed with tabs only.
[ERROR] PiEstimation.java[69:n/a] Line has leading space characters;
indentation should be performed with tabs only.
[ERROR] PiEstimation.java[71:n/a] Line has leading space characters;
indentation should be performed with tabs only.
[ERROR] PiEstimation.java[72:n/a] Line has leading space characters;
indentation should be performed with tabs only.
[ERROR] PiEstimation.java[74:n/a] Line has leading space characters;
indentation should be performed with tabs only.
[ERROR] PiEstimation.java[75:n/a] Line has leading space characters;
indentation should be performed with tabs only.
```
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