/** @param workTokDir Token directory (common for multiple nodes). */
private void cleanupResources(File workTokDir) {
RandomAccessFile lockFile = null;
FileLock lock = null;
try {
lockFile = new RandomAccessFile(new File(workTokDir, LOCK_FILE_NAME), "rw");
lock = lockFile.getChannel().lock();
if (lock != null) processTokenDirectory(workTokDir);
else if (log.isDebugEnabled())
log.debug(
"Token directory is being processed concurrently: " + workTokDir.getAbsolutePath());
} catch (OverlappingFileLockException ignored) {
if (log.isDebugEnabled())
log.debug(
"Token directory is being processed concurrently: " + workTokDir.getAbsolutePath());
} catch (FileLockInterruptionException ignored) {
Thread.currentThread().interrupt();
} catch (IOException e) {
U.error(log, "Failed to process directory: " + workTokDir.getAbsolutePath(), e);
} finally {
U.releaseQuiet(lock);
U.closeQuiet(lockFile);
}
}
/** {@inheritDoc} */
@Override
public void start() throws IgniteCheckedException {
IpcSharedMemoryNativeLoader.load(log);
pid = IpcSharedMemoryUtils.pid();
if (pid == -1) throw new IpcEndpointBindException("Failed to get PID of the current process.");
if (size <= 0) throw new IpcEndpointBindException("Space size should be positive: " + size);
String tokDirPath = this.tokDirPath;
if (F.isEmpty(tokDirPath)) throw new IpcEndpointBindException("Token directory path is empty.");
tokDirPath = tokDirPath + '/' + locNodeId.toString() + '-' + IpcSharedMemoryUtils.pid();
tokDir = U.resolveWorkDirectory(tokDirPath, false);
if (port <= 0 || port >= 0xffff)
throw new IpcEndpointBindException("Port value is illegal: " + port);
try {
srvSock = new ServerSocket();
// Always bind to loopback.
srvSock.bind(new InetSocketAddress("127.0.0.1", port));
} catch (IOException e) {
// Although empty socket constructor never throws exception, close it just in case.
U.closeQuiet(srvSock);
throw new IpcEndpointBindException(
"Failed to bind shared memory IPC endpoint (is port already " + "in use?): " + port, e);
}
gcWorker = new GcWorker(gridName, "ipc-shmem-gc", log);
new IgniteThread(gcWorker).start();
if (log.isInfoEnabled())
log.info(
"IPC shared memory server endpoint started [port="
+ port
+ ", tokDir="
+ tokDir.getAbsolutePath()
+ ']');
}
/** @param workTokDir Token directory (common for multiple nodes). */
private void processTokenDirectory(File workTokDir) {
for (File f : workTokDir.listFiles()) {
if (!f.isDirectory()) {
if (!f.getName().equals(LOCK_FILE_NAME)) {
if (log.isDebugEnabled()) log.debug("Unexpected file: " + f.getName());
}
continue;
}
if (f.equals(tokDir)) {
if (log.isDebugEnabled()) log.debug("Skipping own token directory: " + tokDir.getName());
continue;
}
String name = f.getName();
int pid;
try {
pid = Integer.parseInt(name.substring(name.lastIndexOf('-') + 1));
} catch (NumberFormatException ignored) {
if (log.isDebugEnabled()) log.debug("Failed to parse file name: " + name);
continue;
}
// Is process alive?
if (IpcSharedMemoryUtils.alive(pid)) {
if (log.isDebugEnabled()) log.debug("Skipping alive node: " + pid);
continue;
}
if (log.isDebugEnabled()) log.debug("Possibly stale token folder: " + f);
// Process each token under stale token folder.
File[] shmemToks = f.listFiles();
if (shmemToks == null)
// Although this is strange, but is reproducible sometimes on linux.
return;
int rmvCnt = 0;
try {
for (File f0 : shmemToks) {
if (log.isDebugEnabled()) log.debug("Processing token file: " + f0.getName());
if (f0.isDirectory()) {
if (log.isDebugEnabled()) log.debug("Unexpected directory: " + f0.getName());
}
// Token file format: gg-shmem-space-[auto_idx]-[other_party_pid]-[size]
String[] toks = f0.getName().split("-");
if (toks.length != 6) {
if (log.isDebugEnabled()) log.debug("Unrecognized token file: " + f0.getName());
continue;
}
int pid0;
int size;
try {
pid0 = Integer.parseInt(toks[4]);
size = Integer.parseInt(toks[5]);
} catch (NumberFormatException ignored) {
if (log.isDebugEnabled()) log.debug("Failed to parse file name: " + name);
continue;
}
if (IpcSharedMemoryUtils.alive(pid0)) {
if (log.isDebugEnabled()) log.debug("Skipping alive process: " + pid0);
continue;
}
if (log.isDebugEnabled()) log.debug("Possibly stale token file: " + f0);
IpcSharedMemoryUtils.freeSystemResources(f0.getAbsolutePath(), size);
if (f0.delete()) {
if (log.isDebugEnabled()) log.debug("Deleted file: " + f0.getName());
rmvCnt++;
} else if (!f0.exists()) {
if (log.isDebugEnabled())
log.debug("File has been concurrently deleted: " + f0.getName());
rmvCnt++;
} else if (log.isDebugEnabled()) log.debug("Failed to delete file: " + f0.getName());
}
} finally {
// Assuming that no new files can appear, since
if (rmvCnt == shmemToks.length) {
U.delete(f);
if (log.isDebugEnabled()) log.debug("Deleted empty token directory: " + f.getName());
}
}
}
}