public void sendDistFilesDigestToAgents(Set<String> distFilesDigest) {
		ForkJoinPool myPool = new ForkJoinPool(NUM_OF_SEND_FILE_DIGEST_THREAD);
		myPool.submit(() -> stream(processReports)
			.parallel()
			.forEach(processReport -> getConsoleComponent(ConsoleCommunicationImplementationEx.class)
				.sendToAddressedAgents(
					new AgentAddress(processReport.getAgentProcessReport().getAgentIdentity()),
					new RefreshCacheMessage(distFilesDigest))));
	}
Send digest of unnecessary files to agents for refresh agent's distribution cache directory.

@param distFilesDigest Required file's digest for currently running test.
ngrinder-core/src/main/java/net/grinder/SingleConsole.java