public NodeEnvironment(Settings settings, Environment environment) throws IOException {
if (!DiscoveryNode.nodeRequiresLocalStorage(settings)) {
nodePaths = null;
sharedDataPath = null;
locks = null;
nodeLockId = -1;
nodeMetaData = new NodeMetaData(generateNodeId(settings));
logger =
Loggers.getLogger(
getClass(), Node.addNodeNameIfNeeded(settings, this.nodeMetaData.nodeId()));
return;
}
final NodePath[] nodePaths = new NodePath[environment.dataWithClusterFiles().length];
final Lock[] locks = new Lock[nodePaths.length];
boolean success = false;
// trace logger to debug issues before the default node name is derived from the node id
Logger startupTraceLogger = Loggers.getLogger(getClass(), settings);
try {
sharedDataPath = environment.sharedDataFile();
int nodeLockId = -1;
IOException lastException = null;
int maxLocalStorageNodes = MAX_LOCAL_STORAGE_NODES_SETTING.get(settings);
for (int possibleLockId = 0; possibleLockId < maxLocalStorageNodes; possibleLockId++) {
for (int dirIndex = 0; dirIndex < environment.dataFiles().length; dirIndex++) {
Path dataDirWithClusterName = environment.dataWithClusterFiles()[dirIndex];
Path dataDir = environment.dataFiles()[dirIndex];
Path dir = dataDir.resolve(NODES_FOLDER).resolve(Integer.toString(possibleLockId));
Files.createDirectories(dir);
try (Directory luceneDir = FSDirectory.open(dir, NativeFSLockFactory.INSTANCE)) {
startupTraceLogger.trace("obtaining node lock on {} ...", dir.toAbsolutePath());
try {
locks[dirIndex] = luceneDir.obtainLock(NODE_LOCK_FILENAME);
nodePaths[dirIndex] = new NodePath(dir);
nodeLockId = possibleLockId;
} catch (LockObtainFailedException ex) {
startupTraceLogger.trace("failed to obtain node lock on {}", dir.toAbsolutePath());
// release all the ones that were obtained up until now
releaseAndNullLocks(locks);
break;
}
} catch (IOException e) {
startupTraceLogger.trace(
(Supplier<?>)
() ->
new ParameterizedMessage(
"failed to obtain node lock on {}", dir.toAbsolutePath()),
e);
lastException = new IOException("failed to obtain lock on " + dir.toAbsolutePath(), e);
// release all the ones that were obtained up until now
releaseAndNullLocks(locks);
break;
}
}
if (locks[0] != null) {
// we found a lock, break
break;
}
}
if (locks[0] == null) {
final String message =
String.format(
Locale.ROOT,
"failed to obtain node locks, tried [%s] with lock id%s;"
+ " maybe these locations are not writable or multiple nodes were started without increasing [%s] (was [%d])?",
Arrays.toString(environment.dataWithClusterFiles()),
maxLocalStorageNodes == 1 ? " [0]" : "s [0--" + (maxLocalStorageNodes - 1) + "]",
MAX_LOCAL_STORAGE_NODES_SETTING.getKey(),
maxLocalStorageNodes);
throw new IllegalStateException(message, lastException);
}
this.nodeMetaData = loadOrCreateNodeMetaData(settings, startupTraceLogger, nodePaths);
this.logger =
Loggers.getLogger(
getClass(), Node.addNodeNameIfNeeded(settings, this.nodeMetaData.nodeId()));
this.nodeLockId = nodeLockId;
this.locks = locks;
this.nodePaths = nodePaths;
if (logger.isDebugEnabled()) {
logger.debug("using node location [{}], local_lock_id [{}]", nodePaths, nodeLockId);
}
maybeLogPathDetails();
maybeLogHeapDetails();
applySegmentInfosTrace(settings);
assertCanWrite();
success = true;
} finally {
if (success == false) {
IOUtils.closeWhileHandlingException(locks);
}
}
}
