diff --git a/src/ca/bhe.cpp b/src/ca/bhe.cpp
index 78aaf7ad7..e3882d605 100644
--- a/src/ca/bhe.cpp
+++ b/src/ca/bhe.cpp
@@ -76,7 +76,7 @@ void bhe::logBeacon ( const char * pDiagnostic,
                      const double & currentPeriod,
                      const epicsTime & currentTime )
 {
-    if ( this->pIIU || DEBUG_ALL ) {
+    if ( this->pIIU ) {
         char name[64];
         this->name ( name, sizeof ( name ) );
         char date[64];
@@ -99,7 +99,7 @@ inline void bhe::logBeacon ( const char * /* pDiagnostic */,
 void bhe::logBeaconDiscard ( unsigned beaconAdvance,
                      const epicsTime & currentTime )
 {
-    if ( this->pIIU || DEBUG_ALL ) {
+    if ( this->pIIU ) {
         char name[64];
         this->name ( name, sizeof ( name ) );
         char date[64];
@@ -284,8 +284,8 @@ void bhe::show ( epicsGuard < epicsMutex > &, unsigned level ) const
     char host [64];
     this->name ( host, sizeof ( host ) );
     if ( this->averagePeriod == -DBL_MAX ) {
-        ::printf ( "CA beacon hash entry for %s <no periofd estimate>\n", 
-            host, this->averagePeriod );
+        ::printf ( "CA beacon hash entry for %s <no period estimate>\n", 
+            host );
     }
     else {
         ::printf ( "CA beacon hash entry for %s with period estimate %f\n", 
diff --git a/src/ca/cac.cpp b/src/ca/cac.cpp
index a0c38c24c..ace66feb5 100644
--- a/src/ca/cac.cpp
+++ b/src/ca/cac.cpp
@@ -429,11 +429,11 @@ void cac::beaconNotify ( const inetAddrID & addr, const epicsTime & currentTime,
 
     this->pudpiiu->beaconAnomalyNotify ( guard, currentTime );
 
-#   if DEBUG
+#   ifdef DEBUG
     {
-        char buf[64];
-        ipAddrToDottedIP (pnet_addr, buf, sizeof ( buf ) );
-        printf ("new server available: %s\n", buf);
+        char buf[128];
+        addr.name ( buf, sizeof ( buf ) );
+        printf ( guard, "New server available: %s\n", buf );
     }
 #   endif
 }
diff --git a/src/ca/tcpRecvWatchdog.cpp b/src/ca/tcpRecvWatchdog.cpp
index c76239658..6c0c4cd3d 100644
--- a/src/ca/tcpRecvWatchdog.cpp
+++ b/src/ca/tcpRecvWatchdog.cpp
@@ -64,8 +64,9 @@ tcpRecvWatchdog::expire ( const epicsTime & /* currentTime */ ) // X aCC 361
     "o application is blocked in a callback from the client library\n" );
         }
 #       ifdef DEBUG
+            epicsGuard < epicsMutex > guard ( this->mutex );
             char hostName[128];
-            this->iiu.hostName ( hostName, sizeof (hostName) );
+            this->iiu.hostName ( guard, hostName, sizeof (hostName) );
             debugPrintf ( ( "CA server \"%s\" unresponsive after %g inactive sec"
                             "- disconnecting.\n", 
                 hostName, this->period ) );
diff --git a/src/ca/tcpSendWatchdog.cpp b/src/ca/tcpSendWatchdog.cpp
index 237622cb4..1ee16fb1e 100644
--- a/src/ca/tcpSendWatchdog.cpp
+++ b/src/ca/tcpSendWatchdog.cpp
@@ -27,10 +27,11 @@
 
 tcpSendWatchdog::tcpSendWatchdog ( 
         epicsMutex & cbMutexIn, cacContextNotify & ctxNotifyIn, 
-        tcpiiu & iiuIn, double periodIn, epicsTimerQueue & queueIn ) :
-    period ( periodIn ), timer ( queueIn.createTimer () ),
-        cbMutex ( cbMutexIn ), ctxNotify ( ctxNotifyIn ), 
-        iiu ( iiuIn )
+        epicsMutex & mutexIn, tcpiiu & iiuIn,
+        double periodIn, epicsTimerQueue & queueIn ) :
+        period ( periodIn ), timer ( queueIn.createTimer () ),
+        cbMutex ( cbMutexIn ), ctxNotify ( ctxNotifyIn ),
+        mutex ( mutexIn ), iiu ( iiuIn )
 {
 }
 
@@ -50,8 +51,9 @@ epicsTimerNotify::expireStatus tcpSendWatchdog::expire (
             "application schedualing problem\n" );
     }
 #   ifdef DEBUG
+        epicsGuard < epicsMutex > guard ( this->mutex );
         char hostName[128];
-        this->iiu.hostName ( hostName, sizeof ( hostName ) );
+        this->iiu.hostName ( guard, hostName, sizeof ( hostName ) );
         debugPrintf ( ( "Request not accepted by CA server %s for %g sec. Disconnecting.\n", 
             hostName, this->period ) );
 #   endif
diff --git a/src/ca/tcpSendWatchdog.h b/src/ca/tcpSendWatchdog.h
index 11ccce84b..d947a1ec7 100644
--- a/src/ca/tcpSendWatchdog.h
+++ b/src/ca/tcpSendWatchdog.h
@@ -31,9 +31,10 @@
 
 class tcpSendWatchdog : private epicsTimerNotify {
 public:
-    tcpSendWatchdog ( 
+    tcpSendWatchdog (
         epicsMutex & cbMutex, cacContextNotify & ctxNotify,
-        tcpiiu &, double periodIn, epicsTimerQueue & queueIn );
+        epicsMutex & mutex, tcpiiu &,
+        double periodIn, epicsTimerQueue & queueIn );
     virtual ~tcpSendWatchdog ();
     void start ( const epicsTime & );
     void cancel ();
@@ -42,6 +43,7 @@ private:
     epicsTimer & timer;
     epicsMutex & cbMutex;
     cacContextNotify & ctxNotify;
+    epicsMutex & mutex;
     tcpiiu & iiu;
     expireStatus expire ( const epicsTime & currentTime );
 	tcpSendWatchdog ( const tcpSendWatchdog & );
diff --git a/src/ca/tcpiiu.cpp b/src/ca/tcpiiu.cpp
index d12651260..d137cd507 100644
--- a/src/ca/tcpiiu.cpp
+++ b/src/ca/tcpiiu.cpp
@@ -586,7 +586,7 @@ tcpiiu::tcpiiu (
             cac.getInitializingThreadsPriority() ) ),
     recvDog ( cbMutexIn, ctxNotifyIn, mutexIn, 
         *this, connectionTimeout, timerQueue ),
-    sendDog ( cbMutexIn, ctxNotifyIn, 
+    sendDog ( cbMutexIn, ctxNotifyIn, mutexIn,
         *this, connectionTimeout, timerQueue ),
     sendQue ( *this, comBufMemMgrIn ),
     recvQue ( comBufMemMgrIn ),
@@ -1071,17 +1071,20 @@ bool tcpiiu::processIncoming (
                 this->curMsg.m_count = this->recvQue.popUInt32 ();
             }
             this->msgHeaderAvailable = true;
-            debugPrintf (
-                ( "%s Cmd=%3u Type=%3u Count=%8u Size=%8u",
-                this->pHostName (),
-                this->curMsg.m_cmmd,
-                this->curMsg.m_dataType,
-                this->curMsg.m_count,
-                this->curMsg.m_postsize) );
-            debugPrintf (
-                ( " Avail=%8u Cid=%8u\n",
-                this->curMsg.m_available,
-                this->curMsg.m_cid) );
+#           ifdef DEBUG
+                epicsGuard < epicsMutex > guard ( this->mutex );
+                debugPrintf (
+                    ( "%s Cmd=%3u Type=%3u Count=%8u Size=%8u",
+                      this->pHostName ( guard ),
+                      this->curMsg.m_cmmd,
+                      this->curMsg.m_dataType,
+                      this->curMsg.m_count,
+                      this->curMsg.m_postsize) );
+                debugPrintf (
+                    ( " Avail=%8u Cid=%8u\n",
+                      this->curMsg.m_available,
+                      this->curMsg.m_cid) );
+#           endif
         }
 
         //