}
private int doRun() throws IOException {
NamenodeProtocol proxy = createNNProtocolProxy();
NamespaceInfo nsInfo;
try {
nsInfo = proxy.versionRequest();
} 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.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" +
"=====================================================");
// Check with the user before blowing away data.
if (!NameNode.confirmFormat(
Sets.union(Sets.newHashSet(dirsToFormat),