Exemplo n.º 1
0
 @Transactional
 protected void clearPin(PinTask task) {
   if (task.getPool() != null) {
     /* If the pin record expired or the pin was explicitly
      * unpinned, then the unpin processor may already have
      * submitted a request to the pool to clear the sticky
      * flag. Although out of order delivery of messages is
      * unlikely, if it would happen then we have a race
      * between the set sticky and clear sticky messages. To
      * cover this case we delete the old record and create a
      * fresh one in UNPINNING.
      */
     _dao.deletePin(task.getPin());
     Pin pin = new Pin(task.getSubject(), task.getPnfsId());
     pin.setState(UNPINNING);
     _dao.storePin(pin);
   } else {
     /* We didn't create a sticky flag yet, so there is no
      * reason to keep the record. It will expire by itself,
      * but we delete the record now to avoid that we get
      * tickets from admins wondering why they have records
      * staying in PINNING.
      */
     _dao.deletePin(task.getPin());
   }
 }
Exemplo n.º 2
0
  private void rereadNameSpaceEntry(final PinTask task) throws CacheException {
    /* Ensure that task is still valid and stays valid for the
     * duration of the name space lookup.
     */
    refreshTimeout(task, getExpirationTimeForNameSpaceLookup());

    /* We allow the set of provided attributes to be incomplete
     * and thus add attributes required by pool manager.
     */
    Set<FileAttribute> attributes = EnumSet.noneOf(FileAttribute.class);
    attributes.addAll(task.getFileAttributes().getDefinedAttributes());
    attributes.addAll(PoolMgrSelectReadPoolMsg.getRequiredAttributes());

    _pnfsStub.send(
        new PnfsGetFileAttributes(task.getPnfsId(), attributes),
        PnfsGetFileAttributes.class,
        new AbstractMessageCallback<PnfsGetFileAttributes>() {
          @Override
          public void success(PnfsGetFileAttributes msg) {
            try {
              task.setFileAttributes(msg.getFileAttributes());

              /* Ensure that task is still valid
               * and stays valid for the duration
               * of the pool selection.
               */
              refreshTimeout(task, getExpirationTimeForPoolSelection());
              selectReadPool(task);
            } catch (CacheException e) {
              fail(task, e.getRc(), e.getMessage());
            } catch (RuntimeException e) {
              fail(task, CacheException.UNEXPECTED_SYSTEM_EXCEPTION, e.toString());
            }
          }

          @Override
          public void failure(int rc, Object error) {
            fail(task, rc, error.toString());
          }

          @Override
          public void noroute(CellPath path) {
            /* PnfsManager is unreachable. We
             * expect this to be a transient
             * problem and retry in a moment.
             */
            retry(task, RETRY_DELAY);
          }

          @Override
          public void timeout(CellPath path) {
            /* PnfsManager did not respond. We
             * expect this to be a transient
             * problem and retry in a moment.
             */
            retry(task, SMALL_DELAY);
          }
        });
  }
Exemplo n.º 3
0
  private void setStickyFlag(
      final PinTask task, final String poolName, CellAddressCore poolAddress) {
    /* The pin lifetime should be from the moment the file is
     * actually pinned. Due to staging and pool to pool transfers
     * this may be much later than when the pin was requested.
     */
    Date pinExpiration = task.freezeExpirationTime();

    /* To allow for some drift in clocks we add a safety margin to
     * the lifetime of the sticky bit.
     */
    long poolExpiration =
        (pinExpiration == null) ? -1 : pinExpiration.getTime() + CLOCK_DRIFT_MARGIN;

    PoolSetStickyMessage msg =
        new PoolSetStickyMessage(
            poolName, task.getPnfsId(), true, task.getSticky(), poolExpiration);
    _poolStub.send(
        new CellPath(poolAddress),
        msg,
        PoolSetStickyMessage.class,
        new AbstractMessageCallback<PoolSetStickyMessage>() {
          @Override
          public void success(PoolSetStickyMessage msg) {
            try {
              setToPinned(task);
              task.success();
            } catch (CacheException e) {
              fail(task, e.getRc(), e.getMessage());
            } catch (RuntimeException e) {
              fail(task, CacheException.UNEXPECTED_SYSTEM_EXCEPTION, e.toString());
            }
          }

          @Override
          public void failure(int rc, Object error) {
            switch (rc) {
              case CacheException.POOL_DISABLED:
                /* Pool manager had outdated
                 * information about the pool. Give
                 * it a chance to be updated and
                 * then retry.
                 */
                retry(task, RETRY_DELAY);
                break;
              case CacheException.FILE_NOT_IN_REPOSITORY:
                /* Pnfs manager had stale location
                 * information. The pool clears
                 * this information as a result of
                 * this error, so we retry in a
                 * moment.
                 */
                retry(task, SMALL_DELAY);
                break;
              default:
                fail(task, rc, error.toString());
                break;
            }
          }

          @Override
          public void noroute(CellPath path) {
            /* The pool must have gone down. Give
             * pool manager a moment to notice this
             * and then retry.
             */
            retry(task, RETRY_DELAY);
          }

          @Override
          public void timeout(CellPath path) {
            /* No response from pool. Typically this is
             * because the pool is overloaded.
             */
            fail(task, CacheException.TIMEOUT, "No reply from " + path);
          }
        });
  }