/**
* Returns a new Hadoop Configuration object using the path to the hadoop conf configured in the
* main configuration (flink-conf.yaml). This method is public because its being used in the
* HadoopDataSource.
*/
public static org.apache.hadoop.conf.Configuration getHadoopConfiguration() {
Configuration retConf = new org.apache.hadoop.conf.Configuration();
// We need to load both core-site.xml and hdfs-site.xml to determine the default fs path and
// the hdfs configuration
// Try to load HDFS configuration from Hadoop's own configuration files
// 1. approach: Flink configuration
final String hdfsDefaultPath =
GlobalConfiguration.getString(ConfigConstants.HDFS_DEFAULT_CONFIG, null);
if (hdfsDefaultPath != null) {
retConf.addResource(new org.apache.hadoop.fs.Path(hdfsDefaultPath));
} else {
LOG.debug("Cannot find hdfs-default configuration file");
}
final String hdfsSitePath =
GlobalConfiguration.getString(ConfigConstants.HDFS_SITE_CONFIG, null);
if (hdfsSitePath != null) {
retConf.addResource(new org.apache.hadoop.fs.Path(hdfsSitePath));
} else {
LOG.debug("Cannot find hdfs-site configuration file");
}
// 2. Approach environment variables
String[] possibleHadoopConfPaths = new String[4];
possibleHadoopConfPaths[0] =
GlobalConfiguration.getString(ConfigConstants.PATH_HADOOP_CONFIG, null);
possibleHadoopConfPaths[1] = System.getenv("HADOOP_CONF_DIR");
if (System.getenv("HADOOP_HOME") != null) {
possibleHadoopConfPaths[2] = System.getenv("HADOOP_HOME") + "/conf";
possibleHadoopConfPaths[3] = System.getenv("HADOOP_HOME") + "/etc/hadoop"; // hadoop 2.2
}
for (String possibleHadoopConfPath : possibleHadoopConfPaths) {
if (possibleHadoopConfPath != null) {
if (new File(possibleHadoopConfPath).exists()) {
if (new File(possibleHadoopConfPath + "/core-site.xml").exists()) {
retConf.addResource(
new org.apache.hadoop.fs.Path(possibleHadoopConfPath + "/core-site.xml"));
if (LOG.isDebugEnabled()) {
LOG.debug(
"Adding " + possibleHadoopConfPath + "/core-site.xml to hadoop configuration");
}
}
if (new File(possibleHadoopConfPath + "/hdfs-site.xml").exists()) {
retConf.addResource(
new org.apache.hadoop.fs.Path(possibleHadoopConfPath + "/hdfs-site.xml"));
if (LOG.isDebugEnabled()) {
LOG.debug(
"Adding " + possibleHadoopConfPath + "/hdfs-site.xml to hadoop configuration");
}
}
}
}
}
return retConf;
}
/**
* Entry point for the program.
*
* @param args arguments from the command line
* @throws IOException
*/
@SuppressWarnings("static-access")
public static void main(String[] args) throws IOException {
Option configDirOpt =
OptionBuilder.withArgName("config directory")
.hasArg()
.withDescription("Specify configuration directory.")
.create("configDir");
// tempDir option is used by the YARN client.
Option tempDir =
OptionBuilder.withArgName("temporary directory (overwrites configured option)")
.hasArg()
.withDescription("Specify temporary directory.")
.create(ARG_CONF_DIR);
configDirOpt.setRequired(true);
tempDir.setRequired(false);
Options options = new Options();
options.addOption(configDirOpt);
options.addOption(tempDir);
CommandLineParser parser = new GnuParser();
CommandLine line = null;
try {
line = parser.parse(options, args);
} catch (ParseException e) {
System.err.println("CLI Parsing failed. Reason: " + e.getMessage());
System.exit(FAILURE_RETURN_CODE);
}
String configDir = line.getOptionValue(configDirOpt.getOpt(), null);
String tempDirVal = line.getOptionValue(tempDir.getOpt(), null);
// First, try to load global configuration
GlobalConfiguration.loadConfiguration(configDir);
if (tempDirVal != null // the YARN TM runner has set a value for the temp dir
// the configuration does not contain a temp direcory
&& GlobalConfiguration.getString(ConfigConstants.TASK_MANAGER_TMP_DIR_KEY, null) == null) {
Configuration c = GlobalConfiguration.getConfiguration();
c.setString(ConfigConstants.TASK_MANAGER_TMP_DIR_KEY, tempDirVal);
LOG.info("Setting temporary directory to " + tempDirVal);
GlobalConfiguration.includeConfiguration(c);
}
// print some startup environment info, like user, code revision, etc
EnvironmentInformation.logEnvironmentInfo(LOG, "TaskManager");
// Create a new task manager object
try {
new TaskManager(ExecutionMode.CLUSTER);
} catch (Exception e) {
LOG.fatal("Taskmanager startup failed: " + e.getMessage(), e);
System.exit(FAILURE_RETURN_CODE);
}
// park the main thread to keep the JVM alive (all other threads may be daemon threads)
Object mon = new Object();
synchronized (mon) {
try {
mon.wait();
} catch (InterruptedException ex) {
}
}
}
/**
* All parameters are obtained from the {@link GlobalConfiguration}, which must be loaded prior to
* instantiating the task manager.
*/
public TaskManager(ExecutionMode executionMode) throws Exception {
if (executionMode == null) {
throw new NullPointerException("Execution mode must not be null.");
}
LOG.info("Execution mode: " + executionMode);
// IMPORTANT! At this point, the GlobalConfiguration must have been read!
final InetSocketAddress jobManagerAddress;
{
LOG.info("Reading location of job manager from configuration");
final String address =
GlobalConfiguration.getString(ConfigConstants.JOB_MANAGER_IPC_ADDRESS_KEY, null);
final int port =
GlobalConfiguration.getInteger(
ConfigConstants.JOB_MANAGER_IPC_PORT_KEY,
ConfigConstants.DEFAULT_JOB_MANAGER_IPC_PORT);
if (address == null) {
throw new Exception("Job manager address not configured in the GlobalConfiguration.");
}
// Try to convert configured address to {@link InetAddress}
try {
final InetAddress tmpAddress = InetAddress.getByName(address);
jobManagerAddress = new InetSocketAddress(tmpAddress, port);
} catch (UnknownHostException e) {
LOG.fatal("Could not resolve JobManager host name.");
throw new Exception("Could not resolve JobManager host name: " + e.getMessage(), e);
}
LOG.info("Connecting to JobManager at: " + jobManagerAddress);
}
// Create RPC connection to the JobManager
try {
this.jobManager =
RPC.getProxy(JobManagerProtocol.class, jobManagerAddress, NetUtils.getSocketFactory());
} catch (IOException e) {
LOG.fatal("Could not connect to the JobManager: " + e.getMessage(), e);
throw new Exception("Failed to initialize connection to JobManager: " + e.getMessage(), e);
}
int ipcPort = GlobalConfiguration.getInteger(ConfigConstants.TASK_MANAGER_IPC_PORT_KEY, -1);
int dataPort = GlobalConfiguration.getInteger(ConfigConstants.TASK_MANAGER_DATA_PORT_KEY, -1);
if (ipcPort == -1) {
ipcPort = getAvailablePort();
}
if (dataPort == -1) {
dataPort = getAvailablePort();
}
// Determine our own public facing address and start the server
{
final InetAddress taskManagerAddress;
try {
taskManagerAddress = getTaskManagerAddress(jobManagerAddress);
} catch (Exception e) {
throw new RuntimeException(
"The TaskManager failed to determine its own network address.", e);
}
this.localInstanceConnectionInfo =
new InstanceConnectionInfo(taskManagerAddress, ipcPort, dataPort);
LOG.info("TaskManager connection information:" + this.localInstanceConnectionInfo);
// Start local RPC server
try {
this.taskManagerServer =
RPC.getServer(this, taskManagerAddress.getHostAddress(), ipcPort, IPC_HANDLER_COUNT);
this.taskManagerServer.start();
} catch (IOException e) {
LOG.fatal("Failed to start TaskManager server. " + e.getMessage(), e);
throw new Exception("Failed to start taskmanager server. " + e.getMessage(), e);
}
}
// Try to create local stub of the global input split provider
try {
this.globalInputSplitProvider =
RPC.getProxy(
InputSplitProviderProtocol.class, jobManagerAddress, NetUtils.getSocketFactory());
} catch (IOException e) {
LOG.fatal(e.getMessage(), e);
throw new Exception(
"Failed to initialize connection to global input split provider: " + e.getMessage(), e);
}
// Try to create local stub for the lookup service
try {
this.lookupService =
RPC.getProxy(ChannelLookupProtocol.class, jobManagerAddress, NetUtils.getSocketFactory());
} catch (IOException e) {
LOG.fatal(e.getMessage(), e);
throw new Exception("Failed to initialize channel lookup protocol. " + e.getMessage(), e);
}
// Try to create local stub for the accumulators
try {
this.accumulatorProtocolProxy =
RPC.getProxy(AccumulatorProtocol.class, jobManagerAddress, NetUtils.getSocketFactory());
} catch (IOException e) {
LOG.fatal("Failed to initialize accumulator protocol: " + e.getMessage(), e);
throw new Exception("Failed to initialize accumulator protocol: " + e.getMessage(), e);
}
// Load profiler if it should be used
if (GlobalConfiguration.getBoolean(ProfilingUtils.ENABLE_PROFILING_KEY, false)) {
final String profilerClassName =
GlobalConfiguration.getString(
ProfilingUtils.TASKMANAGER_CLASSNAME_KEY,
"org.apache.flink.runtime.profiling.impl.TaskManagerProfilerImpl");
this.profiler =
ProfilingUtils.loadTaskManagerProfiler(
profilerClassName, jobManagerAddress.getAddress(), this.localInstanceConnectionInfo);
if (this.profiler == null) {
LOG.error("Cannot find class name for the profiler.");
} else {
LOG.info("Profiling of jobs is enabled.");
}
} else {
this.profiler = null;
LOG.info("Profiling of jobs is disabled.");
}
// Get the directory for storing temporary files
final String[] tmpDirPaths =
GlobalConfiguration.getString(
ConfigConstants.TASK_MANAGER_TMP_DIR_KEY,
ConfigConstants.DEFAULT_TASK_MANAGER_TMP_PATH)
.split(",|" + File.pathSeparator);
checkTempDirs(tmpDirPaths);
int numBuffers =
GlobalConfiguration.getInteger(
ConfigConstants.TASK_MANAGER_NETWORK_NUM_BUFFERS_KEY,
ConfigConstants.DEFAULT_TASK_MANAGER_NETWORK_NUM_BUFFERS);
int bufferSize =
GlobalConfiguration.getInteger(
ConfigConstants.TASK_MANAGER_NETWORK_BUFFER_SIZE_KEY,
ConfigConstants.DEFAULT_TASK_MANAGER_NETWORK_BUFFER_SIZE);
// Initialize the channel manager
try {
NetworkConnectionManager networkConnectionManager = null;
switch (executionMode) {
case LOCAL:
networkConnectionManager = new LocalConnectionManager();
break;
case CLUSTER:
int numInThreads =
GlobalConfiguration.getInteger(
ConfigConstants.TASK_MANAGER_NET_NUM_IN_THREADS_KEY,
ConfigConstants.DEFAULT_TASK_MANAGER_NET_NUM_IN_THREADS);
int numOutThreads =
GlobalConfiguration.getInteger(
ConfigConstants.TASK_MANAGER_NET_NUM_OUT_THREADS_KEY,
ConfigConstants.DEFAULT_TASK_MANAGER_NET_NUM_OUT_THREADS);
int lowWaterMark =
GlobalConfiguration.getInteger(
ConfigConstants.TASK_MANAGER_NET_NETTY_LOW_WATER_MARK,
ConfigConstants.DEFAULT_TASK_MANAGER_NET_NETTY_LOW_WATER_MARK);
int highWaterMark =
GlobalConfiguration.getInteger(
ConfigConstants.TASK_MANAGER_NET_NETTY_HIGH_WATER_MARK,
ConfigConstants.DEFAULT_TASK_MANAGER_NET_NETTY_HIGH_WATER_MARK);
networkConnectionManager =
new NettyConnectionManager(
localInstanceConnectionInfo.address(),
localInstanceConnectionInfo.dataPort(),
bufferSize,
numInThreads,
numOutThreads,
lowWaterMark,
highWaterMark);
break;
}
channelManager =
new ChannelManager(
lookupService,
localInstanceConnectionInfo,
numBuffers,
bufferSize,
networkConnectionManager);
} catch (IOException ioe) {
LOG.error(StringUtils.stringifyException(ioe));
throw new Exception("Failed to instantiate ChannelManager.", ioe);
}
// initialize the number of slots
{
int slots = GlobalConfiguration.getInteger(ConfigConstants.TASK_MANAGER_NUM_TASK_SLOTS, -1);
if (slots == -1) {
slots = 1;
LOG.info("Number of task slots not configured. Creating one task slot.");
} else if (slots <= 0) {
throw new Exception("Illegal value for the number of task slots: " + slots);
} else {
LOG.info("Creating " + slots + " task slot(s).");
}
this.numberOfSlots = slots;
}
this.hardwareDescription = HardwareDescriptionFactory.extractFromSystem();
// initialize the memory manager
{
// Check whether the memory size has been explicitly configured.
final long configuredMemorySize =
GlobalConfiguration.getInteger(ConfigConstants.TASK_MANAGER_MEMORY_SIZE_KEY, -1);
final long memorySize;
if (configuredMemorySize == -1) {
// no manually configured memory. take a relative fraction of the free heap space
float fraction =
GlobalConfiguration.getFloat(
ConfigConstants.TASK_MANAGER_MEMORY_FRACTION_KEY,
ConfigConstants.DEFAULT_MEMORY_MANAGER_MEMORY_FRACTION);
memorySize = (long) (this.hardwareDescription.getSizeOfFreeMemory() * fraction);
LOG.info("Using " + fraction + " of the free heap space for managed memory.");
} else if (configuredMemorySize <= 0) {
throw new Exception(
"Invalid value for Memory Manager memory size: " + configuredMemorySize);
} else {
memorySize = configuredMemorySize << 20;
}
final int pageSize =
GlobalConfiguration.getInteger(
ConfigConstants.TASK_MANAGER_NETWORK_BUFFER_SIZE_KEY,
ConfigConstants.DEFAULT_TASK_MANAGER_NETWORK_BUFFER_SIZE);
// Initialize the memory manager
LOG.info(
"Initializing memory manager with "
+ (memorySize >>> 20)
+ " megabytes of memory. "
+ "Page size is "
+ pageSize
+ " bytes.");
try {
@SuppressWarnings("unused")
final boolean lazyAllocation =
GlobalConfiguration.getBoolean(
ConfigConstants.TASK_MANAGER_MEMORY_LAZY_ALLOCATION_KEY,
ConfigConstants.DEFAULT_TASK_MANAGER_MEMORY_LAZY_ALLOCATION);
this.memoryManager = new DefaultMemoryManager(memorySize, this.numberOfSlots, pageSize);
} catch (Throwable t) {
LOG.fatal(
"Unable to initialize memory manager with "
+ (memorySize >>> 20)
+ " megabytes of memory.",
t);
throw new Exception("Unable to initialize memory manager.", t);
}
}
this.ioManager = new IOManager(tmpDirPaths);
this.heartbeatThread =
new Thread() {
@Override
public void run() {
runHeartbeatLoop();
}
};
this.heartbeatThread.setName("Heartbeat Thread");
this.heartbeatThread.start();
// --------------------------------------------------------------------
// Memory Usage
// --------------------------------------------------------------------
final MemoryMXBean memoryMXBean = ManagementFactory.getMemoryMXBean();
final List<GarbageCollectorMXBean> gcMXBeans = ManagementFactory.getGarbageCollectorMXBeans();
LOG.info(getMemoryUsageStatsAsString(memoryMXBean));
boolean startMemoryUsageLogThread =
GlobalConfiguration.getBoolean(
ConfigConstants.TASK_MANAGER_DEBUG_MEMORY_USAGE_START_LOG_THREAD,
ConfigConstants.DEFAULT_TASK_MANAGER_DEBUG_MEMORY_USAGE_START_LOG_THREAD);
if (startMemoryUsageLogThread && LOG.isDebugEnabled()) {
final int logIntervalMs =
GlobalConfiguration.getInteger(
ConfigConstants.TASK_MANAGER_DEBUG_MEMORY_USAGE_LOG_INTERVAL_MS,
ConfigConstants.DEFAULT_TASK_MANAGER_DEBUG_MEMORY_USAGE_LOG_INTERVAL_MS);
new Thread(
new Runnable() {
@Override
public void run() {
try {
while (!isShutDown()) {
Thread.sleep(logIntervalMs);
LOG.debug(getMemoryUsageStatsAsString(memoryMXBean));
LOG.debug(getGarbageCollectorStatsAsString(gcMXBeans));
}
} catch (InterruptedException e) {
LOG.warn("Unexpected interruption of memory usage logger thread.");
}
}
})
.start();
}
}