Github user mgaido91 commented on the issue:
https://github.com/apache/spark/pull/19169
the error the build job is failing for is:
```
core/src/main/scala/org/apache/spark/io/CompressionCodec.scala:24: imported
LZ4BlockInputStream' is permanently hidden by definition of object
LZ4BlockInputStream in package io
[warn] import net.jpountz.lz4.{LZ4BlockInputStream, LZ4BlockOutputStream}
[warn] ^
[error]
core/src/main/scala/org/apache/spark/io/CompressionCodec.scala:120: type
mismatch;
[error] found : Boolean
[error] required: net.jpountz.lz4.LZ4FastDecompressor
[error] new LZ4BlockInputStream(s, disableConcatenationOfByteStream)
[error] ^
[info] Boolean <: net.jpountz.lz4.LZ4FastDecompressor?
[info] false
[warn] one warning found
[error] one error found
[error] (core/compile:compileIncremental) Compilation failed
```
this is not to be related to this PR. I am checking the reason which
introduced the problem. Any idea?
Thanks.
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