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HDFS-3482. hdfs balancer throws ArrayIndexOutOfBoundsException if option is specified without values. Contributed by Madhukara Phatak. 

Submitted by:	Madhukara Phatak.
Reviewed by:	Uma Maheswara Rao G.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1358812 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Uma Maheswara Rao G 2012-07-08 18:39:09 +00:00
parent 52f5c70330
commit 07295260b1
3 changed files with 38 additions and 0 deletions
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3
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -177,6 +177,9 @@ Trunk (unreleased changes)
HDFS-3541. Deadlock between recovery, xceiver and packet responder (Vinay via umamahesh)
HDFS-3482. hdfs balancer throws ArrayIndexOutOfBoundsException
if option is specified without values. ( Madhukara Phatak via umamahesh)
Branch-2 ( Unreleased changes )
INCOMPATIBLE CHANGES

2
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/balancer/Balancer.java
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@ -74,6 +74,7 @@
import org.apache.hadoop.util.StringUtils;
import org.apache.hadoop.util.Tool;
import org.apache.hadoop.util.ToolRunner;
import static com.google.common.base.Preconditions.checkArgument;
/** <p>The balancer is a tool that balances disk space usage on an HDFS cluster
* when some datanodes become full or when new empty nodes join the cluster.
@ -1501,6 +1502,7 @@ static Parameters parse(String[] args) {
if (args != null) {
try {
for(int i = 0; i < args.length; i++) {
checkArgument(args.length >= 2, "args = " + Arrays.toString(args));
if ("-threshold".equalsIgnoreCase(args[i])) {
i++;
try {

33
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/balancer/TestBalancer.java
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@ -453,6 +453,39 @@ private void testBalancerDefaultConstructor(Configuration conf,
}
}
/**
* Test parse method in Balancer#Cli class with wrong number of params
*/
@Test
public void testBalancerCliParseWithWrongParams() {
String parameters[] = new String[] { "-threshold" };
String reason =
"IllegalArgumentException is expected when value is not specified";
try {
Balancer.Cli.parse(parameters);
fail(reason);
} catch (IllegalArgumentException e) {
}
parameters = new String[] { "-policy" };
try {
Balancer.Cli.parse(parameters);
fail(reason);
} catch (IllegalArgumentException e) {
}
parameters = new String[] { "-threshold 1 -policy" };
try {
Balancer.Cli.parse(parameters);
fail(reason);
} catch (IllegalArgumentException e) {
}
}
/**
* @param args
*/