use of org.apache.hadoop.hive.metastore.api.LockState.WAITING in project presto by prestodb.
the class ThriftHiveMetastore method lock.
@Override
public long lock(MetastoreContext metastoreContext, String databaseName, String tableName) {
try {
final LockComponent lockComponent = new LockComponent(EXCLUSIVE, LockLevel.TABLE, databaseName);
lockComponent.setTablename(tableName);
final LockRequest lockRequest = new LockRequest(Lists.newArrayList(lockComponent), metastoreContext.getUsername(), InetAddress.getLocalHost().getHostName());
LockResponse lockResponse = stats.getLock().wrap(() -> getMetastoreClientThenCall(metastoreContext, client -> client.lock(lockRequest))).call();
LockState state = lockResponse.getState();
long lockId = lockResponse.getLockid();
final AtomicBoolean acquired = new AtomicBoolean(state.equals(ACQUIRED));
try {
if (state.equals(WAITING)) {
retry().maxAttempts(Integer.MAX_VALUE - 100).stopOnIllegalExceptions().exceptionMapper(e -> {
if (e instanceof WaitingForLockException) {
// only retry on waiting for lock exception
return e;
} else {
return new IllegalStateException(e.getMessage(), e);
}
}).run("lock", stats.getLock().wrap(() -> getMetastoreClientThenCall(metastoreContext, client -> {
LockResponse response = client.checkLock(new CheckLockRequest(lockId));
LockState newState = response.getState();
if (newState.equals(WAITING)) {
throw new WaitingForLockException("Waiting for lock.");
} else if (newState.equals(ACQUIRED)) {
acquired.set(true);
} else {
throw new RuntimeException(String.format("Failed to acquire lock: %s", newState.name()));
}
return null;
})));
}
} finally {
if (!acquired.get()) {
unlock(metastoreContext, lockId);
}
}
if (!acquired.get()) {
throw new RuntimeException("Failed to acquire lock");
}
return lockId;
} catch (TException e) {
throw new PrestoException(HIVE_METASTORE_ERROR, e);
} catch (Exception e) {
throw propagate(e);
}
}
Aggregations