HDFS-208. name node should warn if only one dir is listed in dfs.name.dir. Contributed by Uma Maheswara Rao G
git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1204119 13f79535-47bb-0310-9956-ffa450edef68
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@ -121,6 +121,9 @@ Release 0.23.1 - UNRELEASED
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HDFS-2563. Some cleanup in BPOfferService. (todd)
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HDFS-208. name node should warn if only one dir is listed in dfs.name.dir.
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(Uma Maheswara Rao G via eli)
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OPTIMIZATIONS
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HDFS-2130. Switch default checksum to CRC32C. (todd)
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@ -306,7 +306,20 @@ private static final void logAuditEvent(UserGroupInformation ugi,
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* @throws IOException if loading fails
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*/
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public static FSNamesystem loadFromDisk(Configuration conf) throws IOException {
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FSImage fsImage = new FSImage(conf);
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Collection<URI> namespaceDirs = FSNamesystem.getNamespaceDirs(conf);
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Collection<URI> namespaceEditsDirs =
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FSNamesystem.getNamespaceEditsDirs(conf);
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if (namespaceDirs.size() == 1) {
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LOG.warn("Only one " + DFS_NAMENODE_NAME_DIR_KEY
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+ " directory configured , beware data loss!");
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}
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if (namespaceEditsDirs.size() == 1) {
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LOG.warn("Only one " + DFS_NAMENODE_EDITS_DIR_KEY
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+ " directory configured , beware data loss!");
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}
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FSImage fsImage = new FSImage(conf, namespaceDirs, namespaceEditsDirs);
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FSNamesystem namesystem = new FSNamesystem(conf, fsImage);
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long loadStart = now();
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