From 94b48e489377d766e50ff1045c0822e5a2b40422 Mon Sep 17 00:00:00 2001
From: Sinisa Veseli <sveseli@anl.gov>
Date: Tue, 30 Apr 2024 13:09:33 -0500
Subject: [PATCH] do not proceed with pvcopy in master field callback unless
 master field was requested

---
 src/pvAccess/monitorFactory.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/pvAccess/monitorFactory.cpp b/src/pvAccess/monitorFactory.cpp
index c467c50..2e9e7e5 100644
--- a/src/pvAccess/monitorFactory.cpp
+++ b/src/pvAccess/monitorFactory.cpp
@@ -292,6 +292,12 @@ void MonitorLocal::dataPut(PVRecordFieldPtr const & pvRecordField)
     {
         cout << "MonitorLocal::dataPut(pvRecordField)" << endl;
     }
+    // If this record field is the master field, and the master field was not
+    // requested, we do not proceed with copy
+    bool isMasterField = pvRecordField->getPVRecord()->getPVStructure()->getFieldOffset()==0;
+    if (isMasterField && !pvCopy->isMasterFieldRequested()) {
+        return;
+    }
     if(state!=active) return;
     {
         Lock xx(mutex);