HDFS-14216. NullPointerException happens in NamenodeWebHdfs. Contributed by lujie.
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@ -273,11 +273,19 @@ public class NamenodeWebHdfsMethods {
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for (String host : StringUtils
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.getTrimmedStringCollection(excludeDatanodes)) {
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int idx = host.indexOf(":");
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if (idx != -1) {
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excludes.add(bm.getDatanodeManager().getDatanodeByXferAddr(
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host.substring(0, idx), Integer.parseInt(host.substring(idx + 1))));
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Node excludeNode = null;
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if (idx != -1) {
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excludeNode = bm.getDatanodeManager().getDatanodeByXferAddr(
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host.substring(0, idx), Integer.parseInt(host.substring(idx + 1)));
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} else {
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excludes.add(bm.getDatanodeManager().getDatanodeByHost(host));
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excludeNode = bm.getDatanodeManager().getDatanodeByHost(host);
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}
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if (excludeNode != null) {
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excludes.add(excludeNode);
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} else {
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LOG.debug("DataNode {} was requested to be excluded, "
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+ "but it was not found.", host);
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}
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}
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}
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@ -239,6 +239,29 @@ public class TestWebHdfsDataLocality {
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}
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}
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@Test
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public void testExcludeWrongDataNode() throws Exception {
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final Configuration conf = WebHdfsTestUtil.createConf();
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final String[] racks = {RACK0};
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final String[] hosts = {"DataNode1"};
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final int nDataNodes = hosts.length;
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final MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf)
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.hosts(hosts).numDataNodes(nDataNodes).racks(racks).build();
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try {
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cluster.waitActive();
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final NameNode namenode = cluster.getNameNode();
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NamenodeWebHdfsMethods.chooseDatanode(
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namenode, "/path", PutOpParam.Op.CREATE, 0,
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DFSConfigKeys.DFS_BLOCK_SIZE_DEFAULT,
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"DataNode2", LOCALHOST, null);
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} catch (Exception e) {
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Assert.fail("Failed to exclude DataNode2" + e.getMessage());
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} finally {
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cluster.shutdown();
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}
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}
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@Test
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public void testChooseDatanodeBeforeNamesystemInit() throws Exception {
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NameNode nn = mock(NameNode.class);
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