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HDFS-4282. TestEditLog.testFuzzSequences FAILED in all pre-commit test. Contributed by Todd Lipcon.

Browse Source 
git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1418214 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Todd Lipcon 2012-12-07 08:18:14 +00:00
parent b096f61fe2
commit 6681523c87
5 changed files with 60 additions and 10 deletions
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4
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/SequenceFile.java
View File

@ -1858,10 +1858,10 @@ private void init(boolean tempReader) throws IOException {
UTF8 className = new UTF8();
className.readFields(in);
keyClassName = className.toString(); // key class name
keyClassName = className.toStringChecked(); // key class name
className.readFields(in);
valClassName = className.toString(); // val class name
valClassName = className.toStringChecked(); // val class name
} else {
keyClassName = Text.readString(in);
valClassName = Text.readString(in);

32
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/UTF8.java
View File

@ -21,6 +21,7 @@
import java.io.IOException;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.UTFDataFormatException;
import org.apache.hadoop.util.StringUtils;
@ -156,6 +157,21 @@ public String toString() {
return buffer.toString();
}
/**
* Convert to a string, checking for valid UTF8.
* @return the converted string
* @throws UTFDataFormatException if the underlying bytes contain invalid
* UTF8 data.
*/
public String toStringChecked() throws IOException {
StringBuilder buffer = new StringBuilder(length);
synchronized (IBUF) {
IBUF.reset(bytes, length);
readChars(IBUF, buffer, length);
}
return buffer.toString();
}
/** Returns true iff <code>o</code> is a UTF8 with the same contents. */
@Override
public boolean equals(Object o) {
@ -238,7 +254,7 @@ public static String readString(DataInput in) throws IOException {
}
private static void readChars(DataInput in, StringBuilder buffer, int nBytes)
throws IOException {
throws UTFDataFormatException, IOException {
DataOutputBuffer obuf = OBUF_FACTORY.get();
obuf.reset();
obuf.write(in, nBytes);
@ -250,15 +266,27 @@ private static void readChars(DataInput in, StringBuilder buffer, int nBytes)
// 0b0xxxxxxx: 1-byte sequence
buffer.append((char)(b & 0x7F));
} else if ((b & 0xE0) == 0xC0) {
if (i >= nBytes) {
throw new UTFDataFormatException("Truncated UTF8 at " +
StringUtils.byteToHexString(bytes, i - 1, 1));
}
// 0b110xxxxx: 2-byte sequence
buffer.append((char)(((b & 0x1F) << 6)
| (bytes[i++] & 0x3F)));
} else if ((b & 0xF0) == 0xE0) {
// 0b1110xxxx: 3-byte sequence
if (i + 1 >= nBytes) {
throw new UTFDataFormatException("Truncated UTF8 at " +
StringUtils.byteToHexString(bytes, i - 1, 2));
}
buffer.append((char)(((b & 0x0F) << 12)
| ((bytes[i++] & 0x3F) << 6)
| (bytes[i++] & 0x3F)));
} else if ((b & 0xF8) == 0xF0) {
if (i + 2 >= nBytes) {
throw new UTFDataFormatException("Truncated UTF8 at " +
StringUtils.byteToHexString(bytes, i - 1, 3));
}
// 0b11110xxx: 4-byte sequence
int codepoint =
((b & 0x07) << 18)
@ -274,7 +302,7 @@ private static void readChars(DataInput in, StringBuilder buffer, int nBytes)
// Only show the next 6 bytes max in the error code - in case the
// buffer is large, this will prevent an exceedingly large message.
int endForError = Math.min(i + 5, nBytes);
throw new IOException("Invalid UTF8 at " +
throw new UTFDataFormatException("Invalid UTF8 at " +
StringUtils.byteToHexString(bytes, i - 1, endForError));
}
}

27
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/TestUTF8.java
View File

@ -20,6 +20,7 @@
import junit.framework.TestCase;
import java.io.IOException;
import java.io.UTFDataFormatException;
import java.util.Random;
import org.apache.hadoop.test.GenericTestUtils;
@ -126,9 +127,9 @@ public void testInvalidUTF8() throws Exception {
try {
UTF8.fromBytes(invalid);
fail("did not throw an exception");
} catch (IOException ioe) {
} catch (UTFDataFormatException utfde) {
GenericTestUtils.assertExceptionContains(
"Invalid UTF8 at ffff01020304", ioe);
"Invalid UTF8 at ffff01020304", utfde);
}
}
@ -142,9 +143,27 @@ public void test5ByteUtf8Sequence() throws Exception {
try {
UTF8.fromBytes(invalid);
fail("did not throw an exception");
} catch (IOException ioe) {
} catch (UTFDataFormatException utfde) {
GenericTestUtils.assertExceptionContains(
"Invalid UTF8 at f88880808004", ioe);
"Invalid UTF8 at f88880808004", utfde);
}
}
/**
* Test that decoding invalid UTF8 due to truncation yields the correct
* exception type.
*/
public void testInvalidUTF8Truncated() throws Exception {
// Truncated CAT FACE character -- this is a 4-byte sequence, but we
// only have the first three bytes.
byte[] truncated = new byte[] {
(byte)0xF0, (byte)0x9F, (byte)0x90 };
try {
UTF8.fromBytes(truncated);
fail("did not throw an exception");
} catch (UTFDataFormatException utfde) {
GenericTestUtils.assertExceptionContains(
"Truncated UTF8 at f09f90", utfde);
}
}
}

3
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
View File

@ -569,6 +569,9 @@ Release 2.0.3-alpha - Unreleased
HDFS-4238. Standby namenode should not do purging of shared
storage edits. (todd)
HDFS-4282. TestEditLog.testFuzzSequences FAILED in all pre-commit test
(todd)
BREAKDOWN OF HDFS-3077 SUBTASKS
HDFS-3077. Quorum-based protocol for reading and writing edit logs.

2
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSImageSerialization.java
View File

@ -197,7 +197,7 @@ static void saveINode2Image(INode node,
public static String readString(DataInputStream in) throws IOException {
DeprecatedUTF8 ustr = TL_DATA.get().U_STR;
ustr.readFields(in);
return ustr.toString();
return ustr.toStringChecked();
}
static String readString_EmptyAsNull(DataInputStream in) throws IOException {