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https://issues.apache.org/jira/browse/PARQUET-2276?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17718735#comment-17718735
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ASF GitHub Bot commented on PARQUET-2276:
-----------------------------------------
Fokko commented on code in PR #1084:
URL: https://github.com/apache/parquet-mr/pull/1084#discussion_r1183079903
##########
parquet-hadoop/src/main/java/org/apache/parquet/hadoop/util/HadoopStreams.java:
##########
@@ -37,6 +41,39 @@ public class HadoopStreams {
private static final Logger LOG =
LoggerFactory.getLogger(HadoopStreams.class);
+ private static final Class<?> byteBufferReadableClass = getReadableClass();
+ static final Constructor<SeekableInputStream> h2SeekableConstructor =
getH2SeekableConstructor();
Review Comment:
Yes, I copied most from the old code to avoid refactoring. I think we can
greatly simplify it because it was still taking Hadoop1 into account. We still
have to check if the wrapped stream is ByteBufferReadable:
https://github.com/apache/hadoop/blob/release-2.4.1/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FSDataInputStream.java#L142-L148
The `hasCapabilities does the same but in a more elegant way.
> ParquetReader reads do not work with Hadoop version 2.8.5
> ---------------------------------------------------------
>
> Key: PARQUET-2276
> URL: https://issues.apache.org/jira/browse/PARQUET-2276
> Project: Parquet
> Issue Type: Bug
> Components: parquet-mr
> Affects Versions: 1.13.0
> Reporter: Atul Mohan
> Assignee: Fokko Driesprong
> Priority: Major
> Fix For: 1.14.0, 1.13.1
>
>
> {{ParquetReader.read() fails with the following exception on parquet-mr
> version 1.13.0 when using hadoop version 2.8.5:}}
> {code:java}
> java.lang.NoSuchMethodError: 'boolean
> org.apache.hadoop.fs.FSDataInputStream.hasCapability(java.lang.String)'
> at
> org.apache.parquet.hadoop.util.HadoopStreams.isWrappedStreamByteBufferReadable(HadoopStreams.java:74)
>
> at org.apache.parquet.hadoop.util.HadoopStreams.wrap(HadoopStreams.java:49)
> at
> org.apache.parquet.hadoop.util.HadoopInputFile.newStream(HadoopInputFile.java:69)
>
> at
> org.apache.parquet.hadoop.ParquetFileReader.<init>(ParquetFileReader.java:787)
>
> at
> org.apache.parquet.hadoop.ParquetFileReader.open(ParquetFileReader.java:657)
> at org.apache.parquet.hadoop.ParquetReader.initReader(ParquetReader.java:162)
> org.apache.parquet.hadoop.ParquetReader.read(ParquetReader.java:135)
> {code}
>
>
>
> From an initial investigation, it looks like HadoopStreams has started using
> [FSDataInputStream.hasCapability|https://github.com/apache/parquet-mr/blob/master/parquet-hadoop/src/main/java/org/apache/parquet/hadoop/util/HadoopStreams.java#L74]
> but _FSDataInputStream_ does not have the _hasCapability_ API in [hadoop
> 2.8.x|https://hadoop.apache.org/docs/r2.8.3/api/org/apache/hadoop/fs/FSDataInputStream.html].
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