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HDFS-2065. Add null checks in DFSClient.getFileChecksum(..). Contributed by Uma Maheswara Rao G 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1195731 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Tsz-wo Sze 2011-11-01 00:38:57 +00:00
parent c46876982e
commit 8d1a09b741
3 changed files with 32 additions and 4 deletions
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3
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -1232,6 +1232,9 @@ Release 0.23.0 - Unreleased
getFileStatus on non-existing files; fix bugs in getBlockLocations; and
changed getFileChecksum json response root to "FileChecksum". (szetszwo)
HDFS-2065. Add null checks in DFSClient.getFileChecksum(..). (Uma
Maheswara Rao G via szetszwo)
BREAKDOWN OF HDFS-1073 SUBTASKS
HDFS-1521. Persist transaction ID on disk between NN restarts.

14
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSClient.java
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@ -1106,8 +1106,11 @@ public class DFSClient implements java.io.Closeable {
ClientProtocol namenode, SocketFactory socketFactory, int socketTimeout
) throws IOException {
//get all block locations
List<LocatedBlock> locatedblocks
= callGetBlockLocations(namenode, src, 0, Long.MAX_VALUE).getLocatedBlocks();
LocatedBlocks blockLocations = callGetBlockLocations(namenode, src, 0, Long.MAX_VALUE);
if (null == blockLocations) {
throw new FileNotFoundException("File does not exist: " + src);
}
List<LocatedBlock> locatedblocks = blockLocations.getLocatedBlocks();
final DataOutputBuffer md5out = new DataOutputBuffer();
int bytesPerCRC = 0;
long crcPerBlock = 0;
@ -1117,8 +1120,11 @@ public class DFSClient implements java.io.Closeable {
//get block checksum for each block
for(int i = 0; i < locatedblocks.size(); i++) {
if (refetchBlocks) { // refetch to get fresh tokens
locatedblocks = callGetBlockLocations(namenode, src, 0, Long.MAX_VALUE)
.getLocatedBlocks();
blockLocations = callGetBlockLocations(namenode, src, 0, Long.MAX_VALUE);
if (null == blockLocations) {
throw new FileNotFoundException("File does not exist: " + src);
}
locatedblocks = blockLocations.getLocatedBlocks();
refetchBlocks = false;
}
LocatedBlock lb = locatedblocks.get(i);

19
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestDistributedFileSystem.java
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@ -412,6 +412,25 @@ public class TestDistributedFileSystem {
final UserGroupInformation ugi = UserGroupInformation.createUserForTesting(
current.getShortUserName() + "x", new String[]{"user"});
try {
((DistributedFileSystem) hdfs).getFileChecksum(new Path(
"/test/TestNonExistingFile"));
fail("Expecting FileNotFoundException");
} catch (FileNotFoundException e) {
assertTrue("Not throwing the intended exception message", e.getMessage()
.contains("File does not exist: /test/TestNonExistingFile"));
}
try {
Path path = new Path("/test/TestExistingDir/");
hdfs.mkdirs(path);
((DistributedFileSystem) hdfs).getFileChecksum(path);
fail("Expecting FileNotFoundException");
} catch (FileNotFoundException e) {
assertTrue("Not throwing the intended exception message", e.getMessage()
.contains("File does not exist: /test/TestExistingDir"));
}
//hftp
final String hftpuri = "hftp://" + nnAddr;
System.out.println("hftpuri=" + hftpuri);