本文整理汇总了Java中org.apache.hadoop.hdfs.server.protocol.NamenodeProtocol.versionRequest方法的典型用法代码示例。如果您正苦于以下问题：Java NamenodeProtocol.versionRequest方法的具体用法？Java NamenodeProtocol.versionRequest怎么用？Java NamenodeProtocol.versionRequest使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类org.apache.hadoop.hdfs.server.protocol.NamenodeProtocol的用法示例。
在下文中一共展示了NamenodeProtocol.versionRequest方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: doRun
import org.apache.hadoop.hdfs.server.protocol.NamenodeProtocol; //导入方法依赖的package包/类
private int doRun() throws IOException {
NamenodeProtocol proxy = createNNProtocolProxy();
NamespaceInfo nsInfo;
boolean isUpgradeFinalized;
try {
nsInfo = proxy.versionRequest();
isUpgradeFinalized = proxy.isUpgradeFinalized();
} catch (IOException ioe) {
LOG.fatal("Unable to fetch namespace information from active NN at " +
otherIpcAddr + ": " + ioe.getMessage());
if (LOG.isDebugEnabled()) {
LOG.debug("Full exception trace", ioe);
}
return ERR_CODE_FAILED_CONNECT;
}
if (!checkLayoutVersion(nsInfo)) {
LOG.fatal("Layout version on remote node (" + nsInfo.getLayoutVersion()
+ ") does not match " + "this node's layout version ("
+ HdfsConstants.NAMENODE_LAYOUT_VERSION + ")");
return ERR_CODE_INVALID_VERSION;
}
System.out.println(
"=====================================================\n" +
"About to bootstrap Standby ID " + nnId + " from:\n" +
" Nameservice ID: " + nsId + "\n" +
" Other Namenode ID: " + otherNNId + "\n" +
" Other NN's HTTP address: " + otherHttpAddr + "\n" +
" Other NN's IPC address: " + otherIpcAddr + "\n" +
" Namespace ID: " + nsInfo.getNamespaceID() + "\n" +
" Block pool ID: " + nsInfo.getBlockPoolID() + "\n" +
" Cluster ID: " + nsInfo.getClusterID() + "\n" +
" Layout version: " + nsInfo.getLayoutVersion() + "\n" +
" isUpgradeFinalized: " + isUpgradeFinalized + "\n" +
"=====================================================");
NNStorage storage = new NNStorage(conf, dirsToFormat, editUrisToFormat);
if (!isUpgradeFinalized) {
// the remote NameNode is in upgrade state, this NameNode should also
// create the previous directory. First prepare the upgrade and rename
// the current dir to previous.tmp.
LOG.info("The active NameNode is in Upgrade. " +
"Prepare the upgrade for the standby NameNode as well.");
if (!doPreUpgrade(storage, nsInfo)) {
return ERR_CODE_ALREADY_FORMATTED;
}
} else if (!format(storage, nsInfo)) { // prompt the user to format storage
return ERR_CODE_ALREADY_FORMATTED;
}
// download the fsimage from active namenode
int download = downloadImage(storage, proxy);
if (download != 0) {
return download;
}
// finish the upgrade: rename previous.tmp to previous
if (!isUpgradeFinalized) {
doUpgrade(storage);
}
return 0;
}