File pacemaker-libcrmcommon-remote-connection-polling-messages.patch of Package pacemaker.14737

commit ae362daa1bdc7b2ae76d8761a1eab0abda6e44e9
Author: Ken Gaillot <kgaillot@redhat.com>
Date:   Thu Feb 23 18:03:27 2017 -0600

    Log: libcrmcommon: improve remote connection polling messages
    
    Most satisfyingly, downgrade -EAGAIN to a trace.

diff --git a/lib/common/remote.c b/lib/common/remote.c
index 80a75818f..ad9cea839 100644
--- a/lib/common/remote.c
+++ b/lib/common/remote.c
@@ -601,13 +601,16 @@ crm_remote_recv_once(crm_remote_t * remote)
 
 /*!
  * \internal
- * \brief Read data off the socket until at least one full message is present or timeout occures.
- * \retval TRUE message read
- * \retval FALSE full message not read
+ * \brief Read message(s) from a remote connection
+ *
+ * \param[in]  remote         Remote connection to read
+ * \param[in]  total_timeout  Fail if message not read in this time (ms)
+ * \param[out] disconnected   Will be set to 1 if disconnect detected
+ *
+ * \return TRUE if at least one full message read, FALSE otherwise
  */
-
 gboolean
-crm_remote_recv(crm_remote_t * remote, int total_timeout /*ms */ , int *disconnected)
+crm_remote_recv(crm_remote_t *remote, int total_timeout, int *disconnected)
 {
     int rc;
     time_t start = time(NULL);
@@ -623,28 +626,32 @@ crm_remote_recv(crm_remote_t * remote, int total_timeout /*ms */ , int *disconne
     remaining_timeout = total_timeout;
     while ((remaining_timeout > 0) && !(*disconnected)) {
 
-        /* read some more off the tls buffer if we still have time left. */
-        crm_trace("waiting to receive remote msg, starting timeout %d, remaining_timeout %d",
-                  total_timeout, remaining_timeout);
+        crm_trace("Waiting for remote data (%d of %d ms timeout remaining)",
+                  remaining_timeout, total_timeout);
         rc = crm_remote_ready(remote, remaining_timeout);
 
         if (rc == 0) {
-            crm_err("poll timed out (%d ms) while waiting to receive msg", remaining_timeout);
+            crm_err("Timed out (%d ms) while waiting for remote data",
+                    remaining_timeout);
             return FALSE;
 
-        } else if(rc < 0) {
-            crm_debug("could not poll: %s (%d)", pcmk_strerror(rc), rc);
+        } else if (rc < 0) {
+            crm_debug("Wait for remote data aborted, will try again: %s "
+                      CRM_XS " rc=%d", pcmk_strerror(rc), rc);
 
         } else {
             rc = crm_remote_recv_once(remote);
-            if(rc > 0) {
+            if (rc > 0) {
                 return TRUE;
+            } else if (rc == -EAGAIN) {
+                crm_trace("Still waiting for remote data");
             } else if (rc < 0) {
-                crm_debug("recv() failed: %s (%d)", pcmk_strerror(rc), rc);
+                crm_debug("Could not receive remote data: %s " CRM_XS " rc=%d",
+                          pcmk_strerror(rc), rc);
             }
         }
 
-        if(rc == -ENOTCONN) {
+        if (rc == -ENOTCONN) {
             *disconnected = 1;
             return FALSE;
         }