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HADOOP-14072. AliyunOSS: Failed to read from stream when seek beyond the download size. Contributed by Genmao Yu

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This commit is contained in:
Kai Zheng 2017-02-15 16:34:30 +08:00
parent 8acb376c9c
commit cd3e59a3dc
2 changed files with 29 additions and 1 deletions
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4
hadoop-tools/hadoop-aliyun/src/main/java/org/apache/hadoop/fs/aliyun/oss/AliyunOSSInputStream.java
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@ -224,8 +224,10 @@ public class AliyunOSSInputStream extends FSInputStream {
if (position == pos) {
return;
} else if (pos > position && pos < position + partRemaining) {
AliyunOSSUtils.skipFully(wrappedStream, pos - position);
long len = pos - position;
AliyunOSSUtils.skipFully(wrappedStream, len);
position = pos;
partRemaining -= len;
} else {
reopen(pos);
}

26
hadoop-tools/hadoop-aliyun/src/test/java/org/apache/hadoop/fs/aliyun/oss/contract/TestAliyunOSSContractSeek.java
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@ -19,8 +19,15 @@
package org.apache.hadoop.fs.aliyun.oss.contract;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.contract.AbstractContractSeekTest;
import org.apache.hadoop.fs.contract.AbstractFSContract;
import org.junit.Test;
import static org.apache.hadoop.fs.contract.ContractTestUtils.createFile;
import static org.apache.hadoop.fs.contract.ContractTestUtils.dataset;
/**
* Aliyun OSS contract seeking tests.
@ -31,4 +38,23 @@ public class TestAliyunOSSContractSeek extends AbstractContractSeekTest {
protected AbstractFSContract createContract(Configuration conf) {
return new AliyunOSSContract(conf);
}
@Test
public void testSeekBeyondDownloadSize() throws Throwable {
describe("seek and read beyond download size.");
Path byteFile = path("byte_file.txt");
// 'fs.oss.multipart.download.size' = 100 * 1024
byte[] block = dataset(100 * 1024 + 10, 0, 255);
FileSystem fs = getFileSystem();
createFile(fs, byteFile, true, block);
FSDataInputStream instream = getFileSystem().open(byteFile);
instream.seek(100 * 1024 - 1);
assertEquals(100 * 1024 - 1, instream.getPos());
assertEquals(144, instream.read());
instream.seek(100 * 1024 + 1);
assertEquals(100 * 1024 + 1, instream.getPos());
assertEquals(146, instream.read());
}
}