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HDFS-10552. DiskBalancer "-query" results in NPE if no plan for the node. Contributed by Anu Engineer.

This commit is contained in:
Anu Engineer 2016-06-22 17:35:55 -07:00 committed by Arpit Agarwal
parent e8de28181a
commit 8a6e354122
3 changed files with 30 additions and 2 deletions
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5
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DiskBalancer.java
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@ -104,6 +104,7 @@ public DiskBalancer(String dataNodeUUID,
scheduler = Executors.newSingleThreadExecutor();
lock = new ReentrantLock();
workMap = new ConcurrentHashMap<>();
this.planID = ""; // to keep protobuf happy.
this.isDiskBalancerEnabled = conf.getBoolean(
DFSConfigKeys.DFS_DISK_BALANCER_ENABLED,
DFSConfigKeys.DFS_DISK_BALANCER_ENABLED_DEFAULT);
@ -223,7 +224,9 @@ public void cancelPlan(String planID) throws DiskBalancerException {
lock.lock();
try {
checkDiskBalancerEnabled();
if ((this.planID == null) || (!this.planID.equals(planID))) {
if (this.planID == null ||
!this.planID.equals(planID) ||
this.planID.isEmpty()) {
LOG.error("Disk Balancer - No such plan. Cancel plan failed. PlanID: " +
planID);
throw new DiskBalancerException("No such plan.",

2
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/diskbalancer/command/QueryCommand.java
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@ -63,7 +63,7 @@ public void execute(CommandLine cmd) throws Exception {
String nodeAddress = nodeName;
// if the string is not name:port format use the default port.
if (!nodeName.matches("^.*:\\d$")) {
if (!nodeName.matches("[^\\:]+:[0-9]{2,5}")) {
int defaultIPC = NetUtils.createSocketAddr(
getConf().getTrimmed(DFSConfigKeys.DFS_DATANODE_IPC_ADDRESS_KEY,
DFSConfigKeys.DFS_DATANODE_IPC_ADDRESS_DEFAULT)).getPort();

25
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/diskbalancer/command/TestDiskBalancerCommand.java
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@ -35,6 +35,7 @@
import org.apache.hadoop.hdfs.DFSConfigKeys;
import org.apache.hadoop.hdfs.HdfsConfiguration;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.hdfs.server.datanode.DataNode;
import org.apache.hadoop.hdfs.server.diskbalancer.connectors.ClusterConnector;
import org.apache.hadoop.hdfs.server.diskbalancer.connectors.ConnectorFactory;
import org.apache.hadoop.hdfs.server.diskbalancer.datamodel.DiskBalancerCluster;
@ -351,4 +352,28 @@ private List<String> runCommand(final String cmdLine) throws Exception {
}
return outputs;
}
/**
* Making sure that we can query the node without having done a submit.
* @throws Exception
*/
@Test
public void testDiskBalancerQueryWithoutSubmit() throws Exception {
Configuration conf = new HdfsConfiguration();
conf.setBoolean(DFSConfigKeys.DFS_DISK_BALANCER_ENABLED, true);
final int numDatanodes = 2;
MiniDFSCluster miniDFSCluster = new MiniDFSCluster.Builder(conf)
.numDataNodes(numDatanodes).build();
try {
miniDFSCluster.waitActive();
DataNode dataNode = miniDFSCluster.getDataNodes().get(0);
final String queryArg = String.format("-query localhost:%d", dataNode
.getIpcPort());
final String cmdLine = String.format("hdfs diskbalancer %s",
queryArg);
runCommand(cmdLine);
} finally {
miniDFSCluster.shutdown();
}
}
}