use of org.apache.accumulo.fate.zookeeper.ZooLock.LockWatcher in project accumulo by apache.
the class ZombieTServer method main.
public static void main(String[] args) throws Exception {
Random random = new Random(System.currentTimeMillis() % 1000);
int port = random.nextInt(30000) + 2000;
Instance instance = HdfsZooInstance.getInstance();
AccumuloServerContext context = new AccumuloServerContext(instance, new ServerConfigurationFactory(instance));
TransactionWatcher watcher = new TransactionWatcher();
final ThriftClientHandler tch = new ThriftClientHandler(context, watcher);
Processor<Iface> processor = new Processor<>(tch);
ServerAddress serverPort = TServerUtils.startTServer(context.getConfiguration(), ThriftServerType.CUSTOM_HS_HA, processor, "ZombieTServer", "walking dead", 2, 1, 1000, 10 * 1024 * 1024, null, null, -1, HostAndPort.fromParts("0.0.0.0", port));
String addressString = serverPort.address.toString();
String zPath = ZooUtil.getRoot(context.getInstance()) + Constants.ZTSERVERS + "/" + addressString;
ZooReaderWriter zoo = ZooReaderWriter.getInstance();
zoo.putPersistentData(zPath, new byte[] {}, NodeExistsPolicy.SKIP);
ZooLock zlock = new ZooLock(zPath);
LockWatcher lw = new LockWatcher() {
@Override
public void lostLock(final LockLossReason reason) {
try {
tch.halt(Tracer.traceInfo(), null, null);
} catch (Exception ex) {
log.error("Exception", ex);
System.exit(1);
}
}
@Override
public void unableToMonitorLockNode(Throwable e) {
try {
tch.halt(Tracer.traceInfo(), null, null);
} catch (Exception ex) {
log.error("Exception", ex);
System.exit(1);
}
}
};
byte[] lockContent = new ServerServices(addressString, Service.TSERV_CLIENT).toString().getBytes(UTF_8);
if (zlock.tryLock(lw, lockContent)) {
log.debug("Obtained tablet server lock {}", zlock.getLockPath());
}
// modify metadata
synchronized (tch) {
while (!tch.halted) {
tch.wait();
}
}
System.exit(0);
}
use of org.apache.accumulo.fate.zookeeper.ZooLock.LockWatcher in project accumulo by apache.
the class SplitRecoveryIT method run.
private void run() throws Exception {
Instance inst = HdfsZooInstance.getInstance();
AccumuloServerContext c = new AccumuloServerContext(inst, new ServerConfigurationFactory(inst));
String zPath = ZooUtil.getRoot(inst) + "/testLock";
IZooReaderWriter zoo = ZooReaderWriter.getInstance();
zoo.putPersistentData(zPath, new byte[0], NodeExistsPolicy.OVERWRITE);
ZooLock zl = new ZooLock(zPath);
boolean gotLock = zl.tryLock(new LockWatcher() {
@Override
public void lostLock(LockLossReason reason) {
System.exit(-1);
}
@Override
public void unableToMonitorLockNode(Throwable e) {
System.exit(-1);
}
}, "foo".getBytes(UTF_8));
if (!gotLock) {
System.err.println("Failed to get lock " + zPath);
}
// run test for a table with one tablet
runSplitRecoveryTest(c, 0, "sp", 0, zl, nke("foo0", null, null));
runSplitRecoveryTest(c, 1, "sp", 0, zl, nke("foo1", null, null));
// run test for tables with two tablets, run test on first and last tablet
runSplitRecoveryTest(c, 0, "k", 0, zl, nke("foo2", "m", null), nke("foo2", null, "m"));
runSplitRecoveryTest(c, 1, "k", 0, zl, nke("foo3", "m", null), nke("foo3", null, "m"));
runSplitRecoveryTest(c, 0, "o", 1, zl, nke("foo4", "m", null), nke("foo4", null, "m"));
runSplitRecoveryTest(c, 1, "o", 1, zl, nke("foo5", "m", null), nke("foo5", null, "m"));
// run test for table w/ three tablets, run test on middle tablet
runSplitRecoveryTest(c, 0, "o", 1, zl, nke("foo6", "m", null), nke("foo6", "r", "m"), nke("foo6", null, "r"));
runSplitRecoveryTest(c, 1, "o", 1, zl, nke("foo7", "m", null), nke("foo7", "r", "m"), nke("foo7", null, "r"));
// run test for table w/ three tablets, run test on first
runSplitRecoveryTest(c, 0, "g", 0, zl, nke("foo8", "m", null), nke("foo8", "r", "m"), nke("foo8", null, "r"));
runSplitRecoveryTest(c, 1, "g", 0, zl, nke("foo9", "m", null), nke("foo9", "r", "m"), nke("foo9", null, "r"));
// run test for table w/ three tablets, run test on last tablet
runSplitRecoveryTest(c, 0, "w", 2, zl, nke("fooa", "m", null), nke("fooa", "r", "m"), nke("fooa", null, "r"));
runSplitRecoveryTest(c, 1, "w", 2, zl, nke("foob", "m", null), nke("foob", "r", "m"), nke("foob", null, "r"));
}
use of org.apache.accumulo.fate.zookeeper.ZooLock.LockWatcher in project accumulo by apache.
the class SimpleGarbageCollector method getZooLock.
private void getZooLock(HostAndPort addr) throws KeeperException, InterruptedException {
String path = ZooUtil.getRoot(getInstance()) + Constants.ZGC_LOCK;
LockWatcher lockWatcher = new LockWatcher() {
@Override
public void lostLock(LockLossReason reason) {
Halt.halt("GC lock in zookeeper lost (reason = " + reason + "), exiting!", 1);
}
@Override
public void unableToMonitorLockNode(final Throwable e) {
// ACCUMULO-3651 Level changed to error and FATAL added to message for slf4j compatibility
Halt.halt(-1, new Runnable() {
@Override
public void run() {
log.error("FATAL: No longer able to monitor lock node ", e);
}
});
}
};
while (true) {
lock = new ZooLock(path);
if (lock.tryLock(lockWatcher, new ServerServices(addr.toString(), Service.GC_CLIENT).toString().getBytes())) {
log.debug("Got GC ZooKeeper lock");
return;
}
log.debug("Failed to get GC ZooKeeper lock, will retry");
sleepUninterruptibly(1, TimeUnit.SECONDS);
}
}
use of org.apache.accumulo.fate.zookeeper.ZooLock.LockWatcher in project accumulo by apache.
the class TabletServer method announceExistence.
private void announceExistence() {
IZooReaderWriter zoo = ZooReaderWriter.getInstance();
try {
String zPath = ZooUtil.getRoot(getInstance()) + Constants.ZTSERVERS + "/" + getClientAddressString();
try {
zoo.putPersistentData(zPath, new byte[] {}, NodeExistsPolicy.SKIP);
} catch (KeeperException e) {
if (KeeperException.Code.NOAUTH == e.code()) {
log.error("Failed to write to ZooKeeper. Ensure that accumulo-site.xml, specifically instance.secret, is consistent.");
}
throw e;
}
tabletServerLock = new ZooLock(zPath);
LockWatcher lw = new LockWatcher() {
@Override
public void lostLock(final LockLossReason reason) {
Halt.halt(serverStopRequested ? 0 : 1, new Runnable() {
@Override
public void run() {
if (!serverStopRequested)
log.error("Lost tablet server lock (reason = {}), exiting.", reason);
gcLogger.logGCInfo(getConfiguration());
}
});
}
@Override
public void unableToMonitorLockNode(final Throwable e) {
Halt.halt(1, new Runnable() {
@Override
public void run() {
log.error("Lost ability to monitor tablet server lock, exiting.", e);
}
});
}
};
byte[] lockContent = new ServerServices(getClientAddressString(), Service.TSERV_CLIENT).toString().getBytes(UTF_8);
for (int i = 0; i < 120 / 5; i++) {
zoo.putPersistentData(zPath, new byte[0], NodeExistsPolicy.SKIP);
if (tabletServerLock.tryLock(lw, lockContent)) {
log.debug("Obtained tablet server lock {}", tabletServerLock.getLockPath());
lockID = tabletServerLock.getLockID().serialize(ZooUtil.getRoot(getInstance()) + Constants.ZTSERVERS + "/");
return;
}
log.info("Waiting for tablet server lock");
sleepUninterruptibly(5, TimeUnit.SECONDS);
}
String msg = "Too many retries, exiting.";
log.info(msg);
throw new RuntimeException(msg);
} catch (Exception e) {
log.info("Could not obtain tablet server lock, exiting.", e);
throw new RuntimeException(e);
}
}
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