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https://issues.apache.org/jira/browse/SPARK-18420?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15663890#comment-15663890
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coneyliu commented on SPARK-18420:
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Thanks for the suggestion, I've updated it.
> Fix the errors caused by lint check in Java
> -------------------------------------------
>
> Key: SPARK-18420
> URL: https://issues.apache.org/jira/browse/SPARK-18420
> Project: Spark
> Issue Type: Improvement
> Components: Build
> Affects Versions: 2.0.1
> Reporter: coneyliu
> Priority: Minor
>
> What changes were proposed in this pull request?
> Small fix, fix the errors caused by lint check in Java
> Clear unused objects and UnusedImports.
> Add suppression rules for the method finalize of NioBufferedFileInputStream.
> Cut the line which is longer than 100 characters into two lines.
> How was this patch tested?
> Travis CI.
> $ build/mvn -T 4 -q -DskipTests -Pyarn -Phadoop-2.3 -Pkinesis-asl -Phive
> -Phive-thriftserver install
> $ dev/lint-java
> Before:
> Checkstyle checks failed at following occurrences:
> [ERROR] src/main/java/org/apache/spark/network/util/TransportConf.java:[21,8]
> (imports) UnusedImports: Unused import -
> org.apache.commons.crypto.cipher.CryptoCipherFactory.
> [ERROR]
> src/test/java/org/apache/spark/network/sasl/SparkSaslSuite.java:[516,5]
> (modifier) RedundantModifier: Redundant 'public' modifier.
> [ERROR]
> src/main/java/org/apache/spark/io/NioBufferedFileInputStream.java:[133]
> (coding) NoFinalizer: Avoid using finalizer method.
> [ERROR]
> src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeMapData.java:[71]
> (sizes) LineLength: Line is longer than 100 characters (found 113).
> [ERROR]
> src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeArrayData.java:[112]
> (sizes) LineLength: Line is longer than 100 characters (found 110).
> [ERROR]
> src/test/java/org/apache/spark/sql/catalyst/expressions/HiveHasherSuite.java:[31,17]
> (modifier) ModifierOrder: 'static' modifier out of order with the JLS
> suggestions.
> [ERROR]src/main/java/org/apache/spark/examples/ml/JavaLogisticRegressionWithElasticNetExample.java:[64]
> (sizes) LineLength: Line is longer than 100 characters (found 103).
> [ERROR]
> src/main/java/org/apache/spark/examples/ml/JavaInteractionExample.java:[22,8]
> (imports) UnusedImports: Unused import - org.apache.spark.ml.linalg.Vectors.
> [ERROR]
> src/main/java/org/apache/spark/examples/ml/JavaInteractionExample.java:[51]
> (regexp) RegexpSingleline: No trailing whitespace allowed.
> After:
> $ build/mvn -T 4 -q -DskipTests -Pyarn -Phadoop-2.3 -Pkinesis-asl -Phive
> -Phive-thriftserver install
> $ dev/lint-java
> Using `mvn` from path:
> /home/travis/build/ConeyLiu/spark/build/apache-maven-3.3.9/bin/mvn
> Checkstyle checks passed.
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