hfutatzhanghb commented on code in PR #6368:
URL: https://github.com/apache/hadoop/pull/6368#discussion_r1458465700
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hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestDFSOutputStream.java:
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@@ -184,6 +186,40 @@ public void testPreventOverflow() throws IOException,
NoSuchFieldException,
runAdjustChunkBoundary(configuredWritePacketSize, finalWritePacketSize);
}
+ @Test(timeout=60000)
+ public void testFirstPacketSizeInNewBlocks() throws IOException {
+ final long blockSize = 1L * 1024 * 1024;
+ final int numDataNodes = 3;
+ final Configuration dfsConf = new Configuration();
+ dfsConf.setLong(DFS_BLOCK_SIZE_KEY, blockSize);
+ MiniDFSCluster dfsCluster = null;
+ dfsCluster = new
MiniDFSCluster.Builder(dfsConf).numDataNodes(numDataNodes).build();
+ dfsCluster.waitActive();
+
+ DistributedFileSystem fs = dfsCluster.getFileSystem();
+ Path fileName = new Path("/testfile.dat");
+ FSDataOutputStream fos = fs.create(fileName);
+ DataChecksum crc32c =
DataChecksum.newDataChecksum(DataChecksum.Type.CRC32C, 512);
+
+ long loop = 0;
+ Random r = new Random();
+ byte[] buf = new byte[1 * 1024 * 1024];
+ r.nextBytes(buf);
+ fos.write(buf);
+ fos.hflush();
+
+ while (loop < 20) {
+ r.nextBytes(buf);
+ fos.write(buf);
+ fos.hflush();
+ loop++;
+ Assert.assertNotEquals(crc32c.getBytesPerChecksum() +
crc32c.getChecksumSize(),
Review Comment:
Sir, thanks for this valuable suggestion. Will fix it soon.
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