diff --git a/CHANGES b/CHANGES
index e07dded67a..fb0bf4c3bc 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,6 @@
+5041.	[test]		The chain test contains a incomplete delegation.
+			[GL #568]
+
 5039.	[bug]		Named could fail to preserve owner name case of new
 			RRset. [GL #420]
 
diff --git a/bin/tests/system/chain/ns2/generic.db b/bin/tests/system/chain/ns2/generic.db
index 60568dd642..8b9d2207dd 100644
--- a/bin/tests/system/chain/ns2/generic.db
+++ b/bin/tests/system/chain/ns2/generic.db
@@ -7,9 +7,10 @@
 ; See the COPYRIGHT file distributed with this work for additional
 ; information regarding copyright ownership.
 
-@	86400	SOA	ns2.nil. hostmaster.ns2.nil. 0 1 1 1 1
-@	86400	NS 	ns2.nil.
+@	86400	SOA	ns2.domain0.nil. hostmaster.ns2.nil. 0 1 1 1 1
+@	86400	NS 	ns2.domain0.nil.
 ns2	86400	A 	10.53.0.2
+ns2	86400	AAAA    fd92:7065:b8e:ffff::2
 
 @       86400	A 	1.2.3.4
 @       86400	AAAA 	1:2:3::4
diff --git a/bin/tests/system/chain/tests.sh b/bin/tests/system/chain/tests.sh
index e7ad91ea9f..bfa81d8248 100644
--- a/bin/tests/system/chain/tests.sh
+++ b/bin/tests/system/chain/tests.sh
@@ -27,6 +27,7 @@ status=`expr $status + $ret`
 n=`expr $n + 1`
 echo_i "checking short DNAME from recursive ($n)"
 ret=0
+$RNDCCMD 10.53.0.7 null --- start test$n --- 2>&1 | sed 's/^/ns7 /' | cat_i
 $DIG $DIGOPTS a.short-dname.example @10.53.0.7 a > dig.out.ns4.short || ret=1
 grep "status: NOERROR" dig.out.ns4.short > /dev/null || ret=1
 if [ $ret != 0 ]; then echo_i "failed"; fi
@@ -43,6 +44,7 @@ status=`expr $status + $ret`
 n=`expr $n + 1`
 echo_i "checking long DNAME from recursive ($n)"
 ret=0
+$RNDCCMD 10.53.0.7 null --- start test$n --- 2>&1 | sed 's/^/ns7 /' | cat_i
 $DIG $DIGOPTS a.long-dname.example @10.53.0.7 a > dig.out.ns4.long || ret=1
 grep "status: NOERROR" dig.out.ns4.long > /dev/null || ret=1
 if [ $ret != 0 ]; then echo_i "failed"; fi
@@ -59,6 +61,7 @@ status=`expr $status + $ret`
 n=`expr $n + 1`
 echo_i "checking (too) long DNAME from recursive with cached DNAME ($n)"
 ret=0
+$RNDCCMD 10.53.0.7 null --- start test$n --- 2>&1 | sed 's/^/ns7 /' | cat_i
 $DIG $DIGOPTS 01234567890123456789012345678901234567890123456789.longlonglonglonglonglonglonglonglonglonglonglonglonglonglong.longlonglonglonglonglonglonglonglonglonglonglonglonglonglong.longlonglonglonglonglonglonglonglonglonglonglonglonglonglong.long-dname.example @10.53.0.7 a > dig.out.ns4.cachedtoolong || ret=1
 grep "status: YXDOMAIN" dig.out.ns4.cachedtoolong > /dev/null || ret=1
 grep '^long-dname\.example\..*DNAME.*long' dig.out.ns4.cachedtoolong > /dev/null || ret=1
@@ -68,6 +71,7 @@ status=`expr $status + $ret`
 n=`expr $n + 1`
 echo_i "checking (too) long DNAME from recursive without cached DNAME ($n)"
 ret=0
+$RNDCCMD 10.53.0.7 null --- start test$n --- 2>&1 | sed 's/^/ns7 /' | cat_i
 $DIG $DIGOPTS 01234567890123456789012345678901234567890123456789.longlonglonglonglonglonglonglonglonglonglonglonglonglonglong.longlonglonglonglonglonglonglonglonglonglonglonglonglonglong.longlonglonglonglonglonglonglonglonglonglonglonglonglong.toolong-dname.example @10.53.0.7 a > dig.out.ns4.uncachedtoolong || ret=1
 grep "status: YXDOMAIN" dig.out.ns4.uncachedtoolong > /dev/null || ret=1
 grep '^toolong-dname\.example\..*DNAME.*long' dig.out.ns4.uncachedtoolong > /dev/null || ret=1
@@ -85,6 +89,7 @@ status=`expr $status + $ret`
 n=`expr $n + 1`
 echo_i "checking CNAME to DNAME from recursive"
 ret=0
+$RNDCCMD 10.53.0.7 null --- start test$n --- 2>&1 | sed 's/^/ns7 /' | cat_i
 $DIG $DIGOPTS cname.example @10.53.0.7 a > dig.out.ns4.cname
 grep "status: NOERROR" dig.out.ns4.cname > /dev/null || ret=1
 grep '^cname.example.' dig.out.ns4.cname > /dev/null || ret=1
@@ -97,6 +102,7 @@ status=`expr $status + $ret`
 n=`expr $n + 1`
 echo_i "checking DNAME is returned with synthesized CNAME before DNAME ($n)"
 ret=0
+$RNDCCMD 10.53.0.7 null --- start test$n --- 2>&1 | sed 's/^/ns7 /' | cat_i
 $DIG $DIGOPTS @10.53.0.7 name.synth-then-dname.example.broken A > dig.out.test$n
 grep "status: NXDOMAIN" dig.out.test$n > /dev/null || ret=1
 grep '^name.synth-then-dname\.example\.broken\..*CNAME.*name.$' dig.out.test$n > /dev/null || ret=1
@@ -107,6 +113,7 @@ status=`expr $status + $ret`
 n=`expr $n + 1`
 echo_i "checking DNAME is returned with CNAME to synthesized CNAME before DNAME ($n)"
 ret=0
+$RNDCCMD 10.53.0.7 null --- start test$n --- 2>&1 | sed 's/^/ns7 /' | cat_i
 $DIG $DIGOPTS @10.53.0.7 cname-to-synth2-then-dname.example.broken A > dig.out.test$n
 grep "status: NXDOMAIN" dig.out.test$n > /dev/null || ret=1
 grep '^cname-to-synth2-then-dname\.example\.broken\..*CNAME.*name\.synth2-then-dname\.example\.broken.$' dig.out.test$n > /dev/null || ret=1
@@ -118,6 +125,7 @@ status=`expr $status + $ret`
 n=`expr $n + 1`
 echo_i "checking CNAME loops are detected ($n)"
 ret=0
+$RNDCCMD 10.53.0.7 null --- start test$n --- 2>&1 | sed 's/^/ns7 /' | cat_i
 $DIG $DIGOPTS @10.53.0.7 loop.example > dig.out.test$n
 grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
 grep "ANSWER: 17" dig.out.test$n > /dev/null || ret=1
@@ -127,6 +135,7 @@ status=`expr $status + $ret`
 n=`expr $n + 1`
 echo_i "checking CNAME to external delegated zones is handled ($n)"
 ret=0
+$RNDCCMD 10.53.0.7 null --- start test$n --- 2>&1 | sed 's/^/ns7 /' | cat_i
 $DIG $DIGOPTS @10.53.0.7 a.example > dig.out.test$n
 grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
 grep "ANSWER: 2" dig.out.test$n > /dev/null || ret=1
@@ -136,6 +145,7 @@ status=`expr $status + $ret`
 n=`expr $n + 1`
 echo_i "checking CNAME to internal delegated zones is handled ($n)"
 ret=0
+$RNDCCMD 10.53.0.7 null --- start test$n --- 2>&1 | sed 's/^/ns7 /' | cat_i
 $DIG $DIGOPTS @10.53.0.7 b.example > dig.out.test$n
 grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
 grep "ANSWER: 2" dig.out.test$n > /dev/null || ret=1
@@ -145,6 +155,7 @@ status=`expr $status + $ret`
 n=`expr $n + 1`
 echo_i "checking CNAME to signed external delgation is handled ($n)"
 ret=0
+$RNDCCMD 10.53.0.7 null --- start test$n --- 2>&1 | sed 's/^/ns7 /' | cat_i
 $DIG $DIGOPTS @10.53.0.7 c.example > dig.out.$n
 grep "status: NOERROR" dig.out.$n > /dev/null || ret=1
 if [ $ret != 0 ]; then echo_i " failed"; fi
@@ -153,6 +164,7 @@ status=`expr $status + $ret`
 n=`expr $n + 1`
 echo_i "checking CNAME to signed internal delgation is handled ($n)"
 ret=0
+$RNDCCMD 10.53.0.7 null --- start test$n --- 2>&1 | sed 's/^/ns7 /' | cat_i
 $DIG $DIGOPTS @10.53.0.7 d.example > dig.out.$n
 grep "status: NOERROR" dig.out.$n > /dev/null || ret=1
 if [ $ret != 0 ]; then echo_i " failed"; fi
@@ -161,30 +173,36 @@ status=`expr $status + $ret`
 n=`expr $n + 1`
 echo_i "checking CNAME chains in various orders ($n)"
 ret=0
+$RNDCCMD 10.53.0.7 null --- start test$n - step 1 --- 2>&1 | sed 's/^/ns7 /' | cat_i
 echo "cname,cname,cname|1,2,3,4,s1,s2,s3,s4" | $SEND
 $DIG $DIGOPTS @10.53.0.7 test.domain.nil > dig.out.1.$n 2>&1
 grep 'status: NOERROR' dig.out.1.$n > /dev/null 2>&1 || ret=1
 grep 'ANSWER: 2' dig.out.1.$n > /dev/null 2>&1 || ret=1
+$RNDCCMD 10.53.0.7 null --- start test$n - step 2 --- 2>&1 | sed 's/^/ns7 /' | cat_i
 $RNDCCMD 10.53.0.7 flush 2>&1 | sed 's/^/ns7 /' | cat_i
 echo "cname,cname,cname|1,1,2,2,3,4,s4,s3,s1" | $SEND
 $DIG $DIGOPTS @10.53.0.7 test.domain.nil > dig.out.2.$n 2>&1
 grep 'status: NOERROR' dig.out.2.$n > /dev/null 2>&1 || ret=1
 grep 'ANSWER: 2' dig.out.2.$n > /dev/null 2>&1 || ret=1
+$RNDCCMD 10.53.0.7 null --- start test$n - step 3 --- 2>&1 | sed 's/^/ns7 /' | cat_i
 $RNDCCMD 10.53.0.7 flush 2>&1 | sed 's/^/ns7 /' | cat_i
 echo "cname,cname,cname|2,1,3,4,s3,s1,s2,s4" | $SEND
 $DIG $DIGOPTS @10.53.0.7 test.domain.nil > dig.out.3.$n 2>&1
 grep 'status: NOERROR' dig.out.3.$n > /dev/null 2>&1 || ret=1
 grep 'ANSWER: 2' dig.out.3.$n > /dev/null 2>&1 || ret=1
+$RNDCCMD 10.53.0.7 null --- start test$n - step 4 --- 2>&1 | sed 's/^/ns7 /' | cat_i
 $RNDCCMD 10.53.0.7 flush 2>&1 | sed 's/^/ns7 /' | cat_i
 echo "cname,cname,cname|4,3,2,1,s4,s3,s2,s1" | $SEND
 $DIG $DIGOPTS @10.53.0.7 test.domain.nil > dig.out.4.$n 2>&1
 grep 'status: NOERROR' dig.out.4.$n > /dev/null 2>&1 || ret=1
 grep 'ANSWER: 2' dig.out.4.$n > /dev/null 2>&1 || ret=1
 echo "cname,cname,cname|4,3,2,1,s4,s3,s2,s1" | $SEND
+$RNDCCMD 10.53.0.7 null --- start test$n - step 5 --- 2>&1 | sed 's/^/ns7 /' | cat_i
 $RNDCCMD 10.53.0.7 flush 2>&1 | sed 's/^/ns7 /' | cat_i
 $DIG $DIGOPTS @10.53.0.7 test.domain.nil > dig.out.5.$n 2>&1
 grep 'status: NOERROR' dig.out.5.$n > /dev/null 2>&1 || ret=1
 grep 'ANSWER: 2' dig.out.5.$n > /dev/null 2>&1 || ret=1
+$RNDCCMD 10.53.0.7 null --- start test$n - step 6 --- 2>&1 | sed 's/^/ns7 /' | cat_i
 $RNDCCMD 10.53.0.7 flush 2>&1 | sed 's/^/ns7 /' | cat_i
 echo "cname,cname,cname|4,3,3,3,s1,s1,1,3,4" | $SEND
 $DIG $DIGOPTS @10.53.0.7 test.domain.nil > dig.out.6.$n 2>&1
@@ -198,6 +216,7 @@ echo_i "checking that only the initial CNAME is cached ($n)"
 ret=0
 $RNDCCMD 10.53.0.7 flush 2>&1 | sed 's/^/ns7 /' | cat_i
 echo "cname,cname,cname|1,2,3,4,s1,s2,s3,s4" | $SEND
+$RNDCCMD 10.53.0.7 null --- start test$n --- 2>&1 | sed 's/^/ns7 /' | cat_i
 $DIG $DIGOPTS @10.53.0.7 test.domain.nil > dig.out.1.$n 2>&1
 sleep 1
 $DIG $DIGOPTS +noall +answer @10.53.0.7 cname1.domain.nil > dig.out.2.$n 2>&1
@@ -209,16 +228,19 @@ status=`expr $status + $ret`
 n=`expr $n + 1`
 echo_i "checking DNAME chains in various orders ($n)"
 ret=0
+$RNDCCMD 10.53.0.7 null --- start test$n - step 1 --- 2>&1 | sed 's/^/ns7 /' | cat_i
 $RNDCCMD 10.53.0.7 flush 2>&1 | sed 's/^/ns7 /' | cat_i
 echo "dname,dname|5,4,3,2,1,s5,s4,s3,s2,s1" | $SEND
 $DIG $DIGOPTS @10.53.0.7 test.domain.nil > dig.out.1.$n 2>&1
 grep 'status: NOERROR' dig.out.1.$n > /dev/null 2>&1 || ret=1
 grep 'ANSWER: 3' dig.out.1.$n > /dev/null 2>&1 || ret=1
+$RNDCCMD 10.53.0.7 null --- start test$n - step 2 --- 2>&1 | sed 's/^/ns7 /' | cat_i
 $RNDCCMD 10.53.0.7 flush 2>&1 | sed 's/^/ns7 /' | cat_i
 echo "dname,dname|5,4,3,2,1,s5,s4,s3,s2,s1" | $SEND
 $DIG $DIGOPTS @10.53.0.7 test.domain.nil > dig.out.2.$n 2>&1
 grep 'status: NOERROR' dig.out.2.$n > /dev/null 2>&1 || ret=1
 grep 'ANSWER: 3' dig.out.2.$n > /dev/null 2>&1 || ret=1
+$RNDCCMD 10.53.0.7 null --- start test$n - step 3 --- 2>&1 | sed 's/^/ns7 /' | cat_i
 $RNDCCMD 10.53.0.7 flush 2>&1 | sed 's/^/ns7 /' | cat_i
 echo "dname,dname|2,3,s1,s2,s3,s4,1" | $SEND
 $DIG $DIGOPTS @10.53.0.7 test.domain.nil > dig.out.3.$n 2>&1
@@ -231,15 +253,18 @@ status=`expr $status + $ret`
 n=`expr $n + 1`
 echo_i "checking external CNAME/DNAME chains in various orders ($n)"
 ret=0
+$RNDCCMD 10.53.0.7 null --- start test$n - step 1 --- 2>&1 | sed 's/^/ns7 /' | cat_i
 echo "xname,dname|1,2,3,4,s1,s2,s3,s4" | $SEND
 $DIG $DIGOPTS @10.53.0.7 test.domain.nil > dig.out.1.$n 2>&1
 grep 'status: NOERROR' dig.out.1.$n > /dev/null 2>&1 || ret=1
 grep 'ANSWER: 2' dig.out.1.$n > /dev/null 2>&1 || ret=1
+$RNDCCMD 10.53.0.7 null --- start test$n - step 2 --- 2>&1 | sed 's/^/ns7 /' | cat_i
 $RNDCCMD 10.53.0.7 flush 2>&1 | sed 's/^/ns7 /' | cat_i
 echo "xname,dname|s2,2,s1,1,4,s4,3" | $SEND
 $DIG $DIGOPTS @10.53.0.7 test.domain.nil > dig.out.2.$n 2>&1
 grep 'status: NOERROR' dig.out.2.$n > /dev/null 2>&1 || ret=1
 grep 'ANSWER: 2' dig.out.2.$n > /dev/null 2>&1 || ret=1
+$RNDCCMD 10.53.0.7 null --- start test$n - step 3 --- 2>&1 | sed 's/^/ns7 /' | cat_i
 $RNDCCMD 10.53.0.7 flush 2>&1 | sed 's/^/ns7 /' | cat_i
 echo "xname,dname|s2,2,2,2" | $SEND
 $DIG $DIGOPTS @10.53.0.7 test.domain.nil > dig.out.3.$n 2>&1
@@ -251,6 +276,7 @@ status=`expr $status + $ret`
 n=`expr $n + 1`
 echo_i "checking explicit DNAME query ($n)"
 ret=0
+$RNDCCMD 10.53.0.7 null --- start test$n --- 2>&1 | sed 's/^/ns7 /' | cat_i
 $DIG $DIGOPTS @10.53.0.7 dname short-dname.example > dig.out.7.$n 2>&1
 grep 'status: NOERROR' dig.out.7.$n > /dev/null 2>&1 || ret=1
 if [ $ret != 0 ]; then echo_i "failed"; fi
@@ -259,6 +285,7 @@ status=`expr $status + $ret`
 n=`expr $n + 1`
 echo_i "checking DNAME via ANY query ($n)"
 ret=0
+$RNDCCMD 10.53.0.7 null --- start test$n --- 2>&1 | sed 's/^/ns7 /' | cat_i
 $RNDCCMD 10.53.0.7 flush 2>&1 | sed 's/^/ns7 /' | cat_i
 $DIG $DIGOPTS @10.53.0.7 any short-dname.example > dig.out.7.$n 2>&1
 grep 'status: NOERROR' dig.out.7.$n > /dev/null 2>&1 || ret=1