if ((inUse ? l != 1 : l > 0)) {
                        log.warn("Disconnected tree while still in use " + this);
                        dumpResource();
                        wasInUse = true;
                        if (sess.getConfig().isTraceResourceUsage()) {
                            throw new RuntimeCIFSException("Disconnected tree while still in use");
                        }
                    }

        assertThrows(SmbException.class, () -> tree.treeConnect(null, null));
        // After failure, state should be reset to disconnected
        assertEquals(0, tree.connectionState);
    }

    @Test
    void testSend() throws SmbException {
        SmbTree tree = new SmbTree(session, "testShare", "A:");

        // Note: Real SmbTransportImpl will report as disconnected without actual socket
        SmbTransportImpl second = testPool.getSmbTransport(ctx, address, 445, false);

        // Then: Will create new connection since real transport has no socket
        assertNotSame(first, second, "Should create new connection when first is disconnected");
    }

    @Test

 * named pipe without actually removing the data from the pipe.
 */
public class TransPeekNamedPipeResponse extends SmbComTransactionResponse {

    /**
     * Named pipe status indicating the pipe is disconnected.
     */
    public static final int STATUS_DISCONNECTED = 1;

    /**
     * Named pipe status indicating the pipe is listening for connections.
     */
    public static final int STATUS_LISTENING = 2;

import jcifs.util.transport.TransportException;

/**
 * This class encapsulates the logic for switching tree connections
 *
 * Switching trees can occur either when the tree has been disconnected by failure or idle-timeout - as well as on
 * DFS referrals.
 *
 * @author mbechler
 *
 */
class SmbTreeConnection implements AutoCloseable {

## Retrying Requests

Sometimes connections fail: either a pooled connection was stale and disconnected, or the webserver itself couldn’t be reached. OkHttp will retry the request with a different route if one is available.

## [Calls](https://square.github.io/okhttp/5.x/okhttp/okhttp3/-call/)

public abstract class RdmaConnection implements AutoCloseable {

    /**
     * RDMA connection state enumeration
     */
    public enum RdmaConnectionState {
        /** Connection is not established */
        DISCONNECTED,
        /** Connection is being established */
        CONNECTING,
        /** Connection is established but not ready for RDMA operations */
        CONNECTED,

    rangeMap.put(Range.closedOpen(7, 10), 2);
    rangeMap.put(Range.closedOpen(12, 15), 2);
    rangeMap.put(Range.closedOpen(18, 19), 3);

    rangeMap.putCoalescing(Range.closedOpen(-5, -4), 0); // disconnected
    rangeMap.putCoalescing(Range.closedOpen(-6, -5), 0); // lower than minimum

    rangeMap.putCoalescing(Range.closedOpen(2, 4), 1); // between
    rangeMap.putCoalescing(Range.closedOpen(9, 14), 0); // different value

        SmbFileHandleImpl h = new SmbFileHandleImpl(cfg, 1, tree, "//server/share", 0, 0, 0, 0, 0L);
        assertTrue(h.isValid());
    }

    @Test
    @DisplayName("isValid() false when tree id changed or disconnected or closed")
    void isValid_false_inVariousCases() {
        when(cfg.isTraceResourceUsage()).thenReturn(false);
        stubValidTree(10L, true, true);

      // create() would catch this, but give a confusing error message
      checkArgument(
          newLower.compareTo(newUpper) <= 0,
          "intersection is undefined for disconnected ranges %s and %s",
          this,
          connectedRange);

      // TODO(kevinb): all the precondition checks in the constructor are redundant...
      return create(newLower, newUpper);
    }
  }