ZMQ.poll cpu 100%

"Thread-2" Id=14 RUNNABLE
    at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)
    -  locked sun.nio.ch.Util$2@7433a0f1
    -  locked java.util.Collections$UnmodifiableSet@698b69d0
    -  locked sun.nio.ch.EPollSelectorImpl@3fd00cd2
    at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
    at zmq.ZMQ.poll(ZMQ.java:705)
    at zmq.ZMQ.poll(ZMQ.java:618)

This is my code

PollItem[] items = new PollItem[ZmqConfig.ZMQ_POLLITEM_SIZE];
items[ZmqConfig.ZMQ_FRONTEND_POLLIN] = new PollItem(frontend.base(), zmq.ZMQ.ZMQ_POLLIN);
items[ZmqConfig.ZMQ_BACKEND_POLLIN] = new PollItem(backend.base(), zmq.ZMQ.ZMQ_POLLIN);
PollItem[] itemsout = new PollItem[ZmqConfig.ZMQ_POLLITEM_SIZE];

itemsout[ZmqConfig.ZMQ_FRONTEND_POLLOUT] = new PollItem(frontend.base(), zmq.ZMQ.ZMQ_POLLOUT);
itemsout[ZmqConfig.ZMQ_BACKEND_POLLOUT] = new PollItem(backend.base(), zmq.ZMQ.ZMQ_POLLOUT);

Selector selector = ctx.createSelector();

while (!Thread.currentThread().isInterrupted()) {
  //  Wait while there are either requests or replies to process.
  zmq.ZMQ.poll(selector, items, ZmqConfig.ZMQ_MSG_POLLIN_TIMEOUT);

  if (frontend != backend) {
    zmq.ZMQ.poll(selector, itemsout, ZmqConfig.ZMQ_MSG_POLLOUT_TIMEOUT);
  }

The result is that the application was blocked in the zmq.ZMQ.poll and the cpu is 100%.It is likely that the application was hang and could not accept any request.

[fredoboulo]

Hi @lsk569937453 did you try with the lastest SNAPSHOT? Fixes where committed in that area after the 0.4.3 release.

[daveyarwood]

I’m going to assume that the issue has been fixed, given what @fredoboulo said above and the fact that this issue was created 1-1/2 years ago.

Feel free to open if the issue persists in the latest release version.