Make sure gpfdist is ready in test cases

It tried to make sure gpfdist is ready by sleep 3 seconds before
queries, but that could not guarantee. This commit changes the sleep to
a retry until gpfdist is ready.

src/bin/gpfdist/regress/input/custom_format.source

@@ -12,7 +12,7 @@ on SEGMENT 0
 FORMAT 'text' (delimiter '|');
 
 CREATE EXTERNAL WEB TABLE gpfdist_start (x text)
-execute E'((@bindir@/gpfdist -p 7575 -d @abs_srcdir@/data/fixedwidth/  </dev/null >/dev/null 2>&1 &); sleep 3; echo "starting...") '
+execute E'((@bindir@/gpfdist -p 7575 -d @abs_srcdir@/data/fixedwidth/  </dev/null >/dev/null 2>&1 &); for i in `seq 1 30`; do curl 127.0.0.1:7575 >/dev/null 2>&1 && break; sleep 1; done; echo "starting...") '
 on SEGMENT 0
 FORMAT 'text' (delimiter '|');
 

src/bin/gpfdist/regress/input/exttab1.source

@@ -37,7 +37,7 @@ on SEGMENT 0
 FORMAT 'text' (delimiter '|');
 
 CREATE EXTERNAL WEB TABLE exttab1_gpfdist_start (x text)
-execute E'((@bindir@/gpfdist -p 7070 -d @abs_srcdir@/data  </dev/null >/dev/null 2>&1 &); sleep 3; echo "starting...") '
+execute E'((@bindir@/gpfdist -p 7070 -d @abs_srcdir@/data  </dev/null >/dev/null 2>&1 &); for i in `seq 1 30`; do curl 127.0.0.1:7070 >/dev/null 2>&1 && break; sleep 1; done; echo "starting...") '
 on SEGMENT 0
 FORMAT 'text' (delimiter '|');
 
@@ -136,7 +136,7 @@ DROP EXTERNAL TABLE EXT_REGION;
 -- gpfdist in csv (mpp-1519, etc)
 --
 CREATE EXTERNAL WEB TABLE gpfdist_csv_start (x text)
-execute E'((@bindir@/gpfdist -p 7070 -d @abs_srcdir@/data  </dev/null >/dev/null 2>&1 &); sleep 3; echo "starting...") '
+execute E'((@bindir@/gpfdist -p 7070 -d @abs_srcdir@/data  </dev/null >/dev/null 2>&1 &); for i in `seq 1 30`; do curl 127.0.0.1:7070 >/dev/null 2>&1 && break; sleep 1; done; echo "starting...") '
 on SEGMENT 0
 FORMAT 'text' (delimiter '|');
 -- 

src/bin/gpfdist/regress/input/gpfdist2.source

@@ -30,7 +30,7 @@ CREATE TABLE REG_REGION (R_REGIONKEY INT, R_NAME CHAR(25), R_COMMENT VARCHAR(152
 -- 'gpfdist' protocol
 -- --------------------------------------
 CREATE EXTERNAL WEB TABLE gpfdist2_start (x text)
-execute E'((@bindir@/gpfdist -p 7070 -d @abs_srcdir@/data  </dev/null >/dev/null 2>&1 &); sleep 3; echo "starting...") '
+execute E'((@bindir@/gpfdist -p 7070 -d @abs_srcdir@/data  </dev/null >/dev/null 2>&1 &); for i in `seq 1 30`; do curl 127.0.0.1:7070 >/dev/null 2>&1 && break; sleep 1; done; echo "starting...") '
 on SEGMENT 0
 FORMAT 'text' (delimiter '|');
 

src/bin/gpfdist/regress/input/gpfdist_ssl.source

@@ -27,12 +27,12 @@
 -- 'gpfdists' protocol
 -- --------------------------------------
 CREATE EXTERNAL WEB TABLE gpfdist_ssl_start (x text)
-execute E'((@bindir@/gpfdist -p 7070 -d @abs_srcdir@/data --ssl @abs_srcdir@/data/gpfdist_ssl/certs_matching </dev/null >/dev/null 2>&1 &); sleep 3; echo "starting...") '
+execute E'((@bindir@/gpfdist -p 7070 -d @abs_srcdir@/data --ssl @abs_srcdir@/data/gpfdist_ssl/certs_matching </dev/null >/dev/null 2>&1 &); for i in `seq 1 30`; do curl 127.0.0.1:7070 >/dev/null 2>&1 && break; sleep 1; done; echo "starting...") '
 on SEGMENT 0
 FORMAT 'text' (delimiter '|');
 
 CREATE EXTERNAL WEB TABLE gpfdist_ssl_not_matching_start (x text)
-execute E'((@bindir@/gpfdist -p 7070 -d @abs_srcdir@/data --ssl @abs_srcdir@/data/gpfdist_ssl/certs_not_matching </dev/null >/dev/null 2>&1 &); sleep 3; echo "starting...") '
+execute E'((@bindir@/gpfdist -p 7070 -d @abs_srcdir@/data --ssl @abs_srcdir@/data/gpfdist_ssl/certs_not_matching </dev/null >/dev/null 2>&1 &); for i in `seq 1 30`; do curl 127.0.0.1:7070 >/dev/null 2>&1 && break; sleep 1; done; echo "starting...") '
 on SEGMENT 0
 FORMAT 'text' (delimiter '|');
 

src/bin/gpfdist/regress/output/custom_format.source

@@ -10,7 +10,7 @@ execute E'( python @bindir@/lib/gppinggpfdist.py @hostname@:7575 2>&1 || echo) '
 on SEGMENT 0
 FORMAT 'text' (delimiter '|');
 CREATE EXTERNAL WEB TABLE gpfdist_start (x text)
-execute E'((@bindir@/gpfdist -p 7575 -d @abs_srcdir@/data/fixedwidth/  </dev/null >/dev/null 2>&1 &); sleep 3; echo "starting...") '
+execute E'((@bindir@/gpfdist -p 7575 -d @abs_srcdir@/data/fixedwidth/  </dev/null >/dev/null 2>&1 &); for i in `seq 1 30`; do curl 127.0.0.1:7575 >/dev/null 2>&1 && break; sleep 1; done; echo "starting...") '
 on SEGMENT 0
 FORMAT 'text' (delimiter '|');
 CREATE EXTERNAL WEB TABLE gpfdist_stop (x text)

src/bin/gpfdist/regress/output/exttab1.source

@@ -14,7 +14,7 @@ execute E'( python @bindir@/lib/gppinggpfdist.py @hostname@:7070 2>&1 || echo) '
 on SEGMENT 0
 FORMAT 'text' (delimiter '|');
 CREATE EXTERNAL WEB TABLE exttab1_gpfdist_start (x text)
-execute E'((@bindir@/gpfdist -p 7070 -d @abs_srcdir@/data  </dev/null >/dev/null 2>&1 &); sleep 3; echo "starting...") '
+execute E'((@bindir@/gpfdist -p 7070 -d @abs_srcdir@/data  </dev/null >/dev/null 2>&1 &); for i in `seq 1 30`; do curl 127.0.0.1:7070 >/dev/null 2>&1 && break; sleep 1; done; echo "starting...") '
 on SEGMENT 0
 FORMAT 'text' (delimiter '|');
 CREATE EXTERNAL WEB TABLE exttab1_gpfdist_stop (x text)
@@ -225,7 +225,7 @@ DROP EXTERNAL TABLE EXT_REGION;
 -- gpfdist in csv (mpp-1519, etc)
 --
 CREATE EXTERNAL WEB TABLE gpfdist_csv_start (x text)
-execute E'((@bindir@/gpfdist -p 7070 -d @abs_srcdir@/data  </dev/null >/dev/null 2>&1 &); sleep 3; echo "starting...") '
+execute E'((@bindir@/gpfdist -p 7070 -d @abs_srcdir@/data  </dev/null >/dev/null 2>&1 &); for i in `seq 1 30`; do curl 127.0.0.1:7070 >/dev/null 2>&1 && break; sleep 1; done; echo "starting...") '
 on SEGMENT 0
 FORMAT 'text' (delimiter '|');
 -- 

src/bin/gpfdist/regress/output/gpfdist2.source

@@ -9,7 +9,7 @@ CREATE TABLE REG_REGION (R_REGIONKEY INT, R_NAME CHAR(25), R_COMMENT VARCHAR(152
 -- 'gpfdist' protocol
 -- --------------------------------------
 CREATE EXTERNAL WEB TABLE gpfdist2_start (x text)
-execute E'((@bindir@/gpfdist -p 7070 -d @abs_srcdir@/data  </dev/null >/dev/null 2>&1 &); sleep 3; echo "starting...") '
+execute E'((@bindir@/gpfdist -p 7070 -d @abs_srcdir@/data  </dev/null >/dev/null 2>&1 &); for i in `seq 1 30`; do curl 127.0.0.1:7070 >/dev/null 2>&1 && break; sleep 1; done; echo "starting...") '
 on SEGMENT 0
 FORMAT 'text' (delimiter '|');
 CREATE EXTERNAL WEB TABLE gpfdist2_stop (x text)

src/bin/gpfdist/regress/output/gpfdist_ssl.source

@@ -7,11 +7,11 @@
 -- 'gpfdists' protocol
 -- --------------------------------------
 CREATE EXTERNAL WEB TABLE gpfdist_ssl_start (x text)
-execute E'((@bindir@/gpfdist -p 7070 -d @abs_srcdir@/data --ssl @abs_srcdir@/data/gpfdist_ssl/certs_matching </dev/null >/dev/null 2>&1 &); sleep 3; echo "starting...") '
+execute E'((@bindir@/gpfdist -p 7070 -d @abs_srcdir@/data --ssl @abs_srcdir@/data/gpfdist_ssl/certs_matching </dev/null >/dev/null 2>&1 &); for i in `seq 1 30`; do curl 127.0.0.1:7070 >/dev/null 2>&1 && break; sleep 1; done; echo "starting...") '
 on SEGMENT 0
 FORMAT 'text' (delimiter '|');
 CREATE EXTERNAL WEB TABLE gpfdist_ssl_not_matching_start (x text)
-execute E'((@bindir@/gpfdist -p 7070 -d @abs_srcdir@/data --ssl @abs_srcdir@/data/gpfdist_ssl/certs_not_matching </dev/null >/dev/null 2>&1 &); sleep 3; echo "starting...") '
+execute E'((@bindir@/gpfdist -p 7070 -d @abs_srcdir@/data --ssl @abs_srcdir@/data/gpfdist_ssl/certs_not_matching </dev/null >/dev/null 2>&1 &); for i in `seq 1 30`; do curl 127.0.0.1:7070 >/dev/null 2>&1 && break; sleep 1; done; echo "starting...") '
 on SEGMENT 0
 FORMAT 'text' (delimiter '|');
 CREATE EXTERNAL WEB TABLE gpfdist_ssl_stop (x text)

src/test/regress/input/sreh.source

@@ -128,7 +128,7 @@ DROP TABLE sreh_constr;
 -- ###########################################################
 
 CREATE EXTERNAL WEB TABLE gpfdist_sreh_start (x text)
-execute E'((@bindir@/gpfdist -p 8080 -d @abs_srcdir@/data  </dev/null >/dev/null 2>&1 &); sleep 3; echo "starting...") '
+execute E'((@bindir@/gpfdist -p 8080 -d @abs_srcdir@/data  </dev/null >/dev/null 2>&1 &); for i in `seq 1 30`; do curl 127.0.0.1:8080 >/dev/null 2>&1 && break; sleep 1; done; echo "starting...") '
 on SEGMENT 0
 FORMAT 'text' (delimiter '|');
 

src/test/regress/output/sreh.source

@@ -225,7 +225,7 @@ DROP TABLE sreh_constr;
 -- External Tables 
 -- ###########################################################
 CREATE EXTERNAL WEB TABLE gpfdist_sreh_start (x text)
-execute E'((@bindir@/gpfdist -p 8080 -d @abs_srcdir@/data  </dev/null >/dev/null 2>&1 &); sleep 3; echo "starting...") '
+execute E'((@bindir@/gpfdist -p 8080 -d @abs_srcdir@/data  </dev/null >/dev/null 2>&1 &); for i in `seq 1 30`; do curl 127.0.0.1:8080 >/dev/null 2>&1 && break; sleep 1; done; echo "starting...") '
 on SEGMENT 0
 FORMAT 'text' (delimiter '|');
 CREATE EXTERNAL WEB TABLE gpfdist_sreh_stop (x text)