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HADOOP-19583. JDK8: RawLocalFileSystem calls ByteBuffer.flip #7725

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steveloughran wants to merge 1 commit into from
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HADOOP-19583. JDK8: RawLocalFileSystem calls ByteBuffer.flip #7725

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3 changes: 2 additions & 1 deletion ...p-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/RawLocalFileSystem.java
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Original file line number Diff line number Diff line change
Expand Up @@ -32,6 +32,7 @@
import java.io.OutputStream;
import java.io.FileDescriptor;
import java.net.URI;
import java.nio.Buffer;
import java.nio.ByteBuffer;
import java.nio.channels.AsynchronousFileChannel;
import java.nio.channels.CompletionHandler;
Expand Down Expand Up @@ -425,7 +426,7 @@ public void completed(Integer result, Integer rangeIndex) {
channel.read(buffer, range.getOffset() + buffer.position(), rangeIndex, this);
} else {
// Flip the buffer and declare success.
buffer.flip();
((Buffer)(buffer)).flip();
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@zeekling zeekling Jun 5, 2025

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Do you use jdk17 build hadoop, and run on jdk8?
If so, you need check in all project like this, I think it has so many.

range.getData().complete(buffer);
}
}
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5 changes: 3 additions & 2 deletions hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/S3AInputStream.java
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Original file line number Diff line number Diff line change
Expand Up @@ -24,6 +24,7 @@
import java.io.InputStream;
import java.io.InterruptedIOException;
import java.net.SocketTimeoutException;
import java.nio.Buffer;
import java.nio.ByteBuffer;
import java.util.List;
import java.util.Optional;
Expand Down Expand Up @@ -1029,7 +1030,7 @@ private void readSingleRange(FileRange range, ByteBuffer buffer) {
LOG.debug("Start reading {} from {} ", range, getPathStr());
if (range.getLength() == 0) {
// a zero byte read.
buffer.flip();
((Buffer)(buffer)).flip();
range.getData().complete(buffer);
return;
}
Expand Down Expand Up @@ -1092,7 +1093,7 @@ private void populateBuffer(FileRange range,
readByteArray(objectContent, range, tmp, offset, currentLength);
return null;
});
buffer.flip();
((Buffer)(buffer)).flip();
} else {
// there is no use of a temp byte buffer, or buffer.put() calls,
// so flip() is not needed.
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