diff -r 4ebc2e2fb97c -r 71c04702a3d5 test/jdk/sun/tools/jstat/gcCauseOutput1.awk
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/sun/tools/jstat/gcCauseOutput1.awk	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,39 @@
+#
+# matching the following output specified as a pattern that verifies
+# that the numerical values conform to a specific pattern, rather than
+# specific values.
+#
+#  S0     S1     E      O      M     CCS    YGC     YGCT    FGC    FGCT     GCT    LGCC                 GCC                 
+#  0.00   0.00   0.00   9.97  90.94  87.70      2    0.013     0    0.000    0.013 Allocation Failure   No GC
+
+
+BEGIN	{
+	    headerlines=0; datalines=0; totallines=0
+	}
+
+/^  S0     S1     E      O      M     CCS    YGC     YGCT    FGC    FGCT     GCT    LGCC                 GCC                 $/	{
+	    headerlines++;
+	}
+
+# The following pattern does not verify the validity of the gc cause
+# string as the values can vary depending on conditions out of our
+# control. To accomodate this variability, the pattern matcher simply
+# detects that there are two strings that match a specific pattern
+# where the first character is a letter followed by a sequence of zero
+# or more letters and spaces. It also provides for the ".", "(", and ")"
+# characters to allow for the string "System.gc()".
+#
+/^[ ]*[0-9]+\.[0-9]+[ ]*[0-9]+\.[0-9]+[ ]*[0-9]+\.[0-9]+[ ]*[0-9]+\.[0-9]+[ ]*[0-9]+\.[0-9]+[ ]*([0-9]+\.[0-9]+)|-[ ]*[0-9]+[ ]*[0-9]+\.[0-9]+[ ]*[0-9]+[ ]*[0-9]+\.[0-9]+[ ]*[0-9]+\.[0-9]+[ ]*[a-zA-Z]+[a-zA-Z \.\(\)]*[ ]*[a-zA-Z]+[a-zA-Z \.\(\)]*$/	{
+	    datalines++;
+	}
+
+	{ totallines++; print $0 }
+
+END	{
+	    if ((headerlines == 1) && (datalines == 1)) {
+	        exit 0
+	    }
+	    else {
+	        exit 1
+	    }
+	}