/** {@inheritDoc} */ @SuppressWarnings("BusyWait") @Override public Boolean reduce(List<GridComputeJobResult> results) throws GridException { assert taskSes != null; assert results != null; assert params != null; assert !params.isEmpty(); assert results.size() == params.size(); Map<String, Integer> receivedParams = new HashMap<>(); boolean allAttrReceived = false; int cnt = 0; while (!allAttrReceived && cnt++ < 3) { allAttrReceived = true; for (Map.Entry<String, Integer> entry : params.entrySet()) { assert taskSes.getAttribute(entry.getKey()) != null; Integer newVal = (Integer) taskSes.getAttribute(entry.getKey()); assert newVal != null; receivedParams.put(entry.getKey(), newVal); if (newVal != entry.getValue() + 1) allAttrReceived = false; } if (!allAttrReceived) { try { Thread.sleep(100); } catch (InterruptedException e) { throw new GridException("Thread interrupted.", e); } } } if (log.isDebugEnabled()) { for (Map.Entry<String, Integer> entry : receivedParams.entrySet()) { log.debug( "Received session attr value [name=" + entry.getKey() + ", val=" + entry.getValue() + ", expected=" + (params.get(entry.getKey()) + 1) + ']'); } } return allAttrReceived; }