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https://issues.apache.org/jira/browse/DIRMINA-1173?focusedWorklogId=918930&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-918930
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ASF GitHub Bot logged work on DIRMINA-1173:
-------------------------------------------
Author: ASF GitHub Bot
Created on: 11/May/24 16:40
Start Date: 11/May/24 16:40
Worklog Time Spent: 10m
Work Description: jon-valliere commented on code in PR #44:
URL: https://github.com/apache/mina/pull/44#discussion_r1597475482
##########
mina-core/src/main/java/org/apache/mina/transport/socket/DefaultSocketSessionConfig.java:
##########
@@ -37,7 +37,7 @@ public class DefaultSocketSessionConfig extends
AbstractSocketSessionConfig {
private static final int DEFAULT_SO_LINGER = -1;
- private static final boolean DEFAULT_TCP_NO_DELAY = false;
+ private static final boolean DEFAULT_TCP_NO_DELAY = true; // Disable Nagle
algorithm by default
Review Comment:
Disabling Nagle by default may create context switching performance hits in
certain applications. Any situation where you may invoke more than one write
in sequence, receives performance boosts from the way the IO scheduler works in
TCP because it can produce MORE packets in a single go and does not have to be
woken up as often. The OS itself does not disable Nagle by default and I do
not think we should make this decision for the end user. As long as they can
configure it, I think the default should be `unset` (to allow the OS default to
apply). If other applications, built on MINA, want to configure a new default
then it is up to them. For SSHD or Apache Directory, if you want to disable
Nagle there, that is fine.
Issue Time Tracking
-------------------
Worklog Id: (was: 918930)
Time Spent: 50m (was: 40m)
> Apache mina 2.2.1 threads blocking on ConnectFuture.awaitUninterruptibly()
> for ever
> -----------------------------------------------------------------------------------
>
> Key: DIRMINA-1173
> URL: https://issues.apache.org/jira/browse/DIRMINA-1173
> Project: MINA
> Issue Type: Bug
> Components: Core
> Affects Versions: 2.2.1
> Reporter: KMVS
> Priority: Critical
> Attachments: dumpLatest-1.log
>
> Time Spent: 50m
> Remaining Estimate: 0h
>
> Hi All,
> I have attached thread dump too for analysis.
> I have migrated from 2.0.21 to 2.023 for solving CVE, i have seen thread
> blocking issue, So used latest mina verstion 2.2.1 but still threads were
> blocked here is the sample code.Thread hungs at {*}awaitUninterruptibly{*}.
> Once this issue comes in sub sequest launches nothing will work all threads
> will be blocked forever,i have to restart the process to make it work. For
> single thread working fine,if i start 50-100 threads this thread blocking
> issue will surface.I am using the same NioSocketConnector across the threads.
> Here is an scenario, I have one gate way IP which i connect initially ,this
> gate way will return list of ips.
> now i will close the previous IOsession and will create a nio connection with
> the first ip in the list.if it did n't work then again i will try to
> connect to next ip etc..
> All these are in the critical section. i.e i will acquire a lock and then
> after successful connection i will release the lock.
> But problem i have noticed is with the awaitUninterruptibly().
> I have a state machine too. So connection set up is in one thread and
> response processing is in another thread.
>
> *Thread 1:*
> Public class g10CaptureService
> {
>
> private static final ProtocolCodecFilter probeCodecFilter = new
> ProtocolCodecFilter(new ProbeCodecFactory(G10Message.class));
> *private static final ExecutorFilter executorFilter = new
> ExecutorFilter(16,32);*
> private static final G10GPBMessageIoFilter gpbMessageFilter = new
> G10GPBMessageIoFilter(G10ParserContextFactory.getG10ParsingAndEncodingInstance());
> static
> {
> initConnectors()
> }
> protected static void initConnectors()
> {
> StateMachine stateMachine =
> StateMachineFactory.getInstance(IoHandlerTransition.class).create(
> G10MinaClient.CONNECTED, new G10MinaClient(processor));
> IoHandler ioHandler = new
> StateMachineProxyBuilder().setStateContextLookup(
> new IoSessionStateContextLookup(new StateContextFactory() {
> @Override
> public StateContext create() {
> final G10StateContext stateContext = new
> G10StateContext();
> stateContext.setStartedTime(new Date());
> return stateContext;
> }
> })).create(IoHandler.class, stateMachine);
>
>
> //Global connector across the system, i.e multiple threads uses the same
> connector.
> NioSocketConnector connector = new NioSocketConnector();
> connector.getFilterChain().addLast("LoggingFilter",
> G10CaptureService.loggingFilter);
> connector.getFilterChain().addLast("codecFilter",
> G10CaptureService.probeCodecFilter);
> connector.getFilterChain().addLast("executorFilter",
> G10CaptureService.executorFilter);
> connector.getFilterChain().addLast("gpbMessageFilter",
> G10CaptureService.gpbMessageFilter);
> connector.getFilterChain().addLast("keepAliveFilter",
> G10CaptureService.keepAliveFilter);
> connector.setHandler(ioHandler);
> }
>
> public void StartRecordCapture()
> {
> connectionLock.lock();
> try
> {
> ConnectFuture primaryConnectFuture = connector.connect(primaryAddress,
> initializer);
> //hungs forever if the no. of threads are more than 30
> primaryConnectFuture.awaitUninterruptibly();//no time out specified
> if (!primaryConnectFuture.isConnected())
> {
>
> if (handleIOException(searchExpression, captureHandler)) {
> return;
> }
> LOG.info("{} Apache mina connection setup time out
> happend.",
> handleConnectionFailed(primaryAddress, captureHandler,
> "Primary IP connection timeout");
> return;
> }
> }catch(Exception e)
> {
> }finally
> {
> connectionLock.unLock();
> }
> }
> *Thread 2:*
> public void processGatewaySrQueryResponseSuccess(G10StateContext context,
> IoSession session, GatewaySrQueryResponse response) {
> //get the g10CaptureService from the Thread1 IOsession
> if(response.getIpPortCount() > 0) {
> try {
> List<IpAddrPort> msgIpPorts = response.getIpPortList();
> List<InetSocketAddress> probeIpPorts = new
> ArrayList<InetSocketAddress>();
> for (IpAddrPort ipp : msgIpPorts) {
> InetSocketAddress inetSockAddr = new
> InetSocketAddress(InetAddress.getByAddress(ipp.getIp().toByteArray()),
> ipp.getPort());
> probeIpPorts.add(inetSockAddr);
> }
> g10CaptureService.setProbeIps(probeIpPorts);
> } catch (Exception ex) {
> LOG.error("{} Exception occured while creating probe
> IP/Port.Exception:{}", getLogStr(session), ex);
> }
> context.addGeoBladeGwSession(session);
>
> g10CaptureService.closeConnectionForSession(session); //cose thread1
> io session
> g10CaptureService.setIsGeoBladeIdlSession(true);
> g10CaptureService.startRecordCapture(searchExpression,
> captureHandler, captureId); //connect to the probe again using
> same thread 1 instance with different ip
> }
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