Add regression test case for testing "invalid degenerate backend request".

This is the test for commit: 214e0017

diff --git a/src/test/regression/tests/077.invalid_failover_node/test.sh b/src/test/regression/tests/077.invalid_failover_node/test.sh
new file mode 100755 (executable)
index 0000000..00fd56b
--- /dev/null
+++ b/src/test/regression/tests/077.invalid_failover_node/test.sh
@@ -0,0 +1,83 @@
+#!/usr/bin/env bash
+#-------------------------------------------------------------------
+# test script for "invalid degenerate backend request" issue.
+# ([pgpool-hackers: 4127] invalid degenerate backend request, node id : 2 status: [2] is not valid for failover)
+
+source $TESTLIBS
+TESTDIR=testdir
+PSQL=$PGBIN/psql
+PG_CTL=$PGBIN/pg_ctl
+PCP_PROMOTE_NODE=$PGPOOL_INSTALL_DIR/bin/pcp_promote_node
+PCP_NODE_INFO=$PGPOOL_INSTALL_DIR/bin/pcp_node_info
+
+rm -fr $TESTDIR
+mkdir $TESTDIR
+cd $TESTDIR
+
+# create test environment
+echo -n "creating test environment..."
+$PGPOOL_SETUP -n 3 || exit 1
+echo "done."
+
+# set node 1 down state
+sed -i '2s/up/down/' log/pgpool_status
+
+# remove "-D" option from startall script
+sed -i 's/pgpool -D/pgpool/' startall
+
+source ./bashrc.ports
+
+export PGPORT=$PGPOOL_PORT
+
+./startall
+wait_for_pgpool_startup
+
+echo === make sure that health check process for node 1 does not exist ===
+ps x|grep "health check"
+
+$PCP_NODE_INFO -w -p $PCP_PORT -a
+
+echo === promote node 2 as a primary node ===
+$PCP_PROMOTE_NODE -w -p $PCP_PORT --switchover 2
+wait_for_pgpool_startup
+
+# wait until node 1 up
+ok=ng
+for i in 1 2 3 4 5
+do
+    $PCP_NODE_INFO -w -p $PCP_PORT 1|grep waiting
+    if [ $? -eq 0 ];then
+       ok=ok
+       break;
+    fi
+    echo sleep 1
+    sleep 1
+done
+
+if [ $ok != "ok" ];then
+    echo === pcp_promote_node did not complete ===
+    ./shutdownall
+    exit 1
+fi
+
+echo === make sure that health check process for node 1 does exist ===
+ps x|grep "health check"
+
+echo === shutdown node 1 ===
+$PG_CTL -D data1 stop
+# we cannot use wait_for_pgpool_startup here because we want to detect the node 1 down by health check.
+#wait_for_pgpool_startup
+echo sleep 5
+sleep 5
+
+echo === make sure that node 1 is now down ===
+$PCP_NODE_INFO -w -p $PCP_PORT 1|grep "down down"
+
+if [ $? -eq 0 ];then
+    ./shutdownall
+    exit 0
+fi
+
+./shutdownall
+exit 1
+