Back-patch relevant parts of these commits:
30717637c Fix isolationtester race condition for notices sent before blocking
ebd499282 Don't drop NOTICE messages in isolation tests
a28e10e82 Indicate session name in isolationtester notices
This ensures that older versions of the isolationtester will handle
NOTICE/WARNING messages the same way as HEAD and v12 do. While this
isn't fixing any critical problem right now, it seems like a prudent
change to prevent surprises (like we had yesterday...) with
back-patches of future isolation test changes.
Back-patch as far as 9.6. Due to the significant changes we made in
isolationtester in 9.6, back-patching isolation tests further than
that is going to be risky anyway; besides, this patch doesn't apply
cleanly before that.
Discussion: https://postgr.es/m/E1i7IqC-0000Uc-5H@gemulon.postgresql.org
step controller_show: SELECT * FROM upserttest;
key data
+s1: NOTICE: called for k1
+s1: NOTICE: blocking 3
step s1_upsert: INSERT INTO upserttest(key, data) VALUES('k1', 'inserted s1') ON CONFLICT (blurt_and_lock(key)) DO UPDATE SET data = upserttest.data || ' with conflict update s1'; <waiting ...>
+s2: NOTICE: called for k1
+s2: NOTICE: blocking 3
step s2_upsert: INSERT INTO upserttest(key, data) VALUES('k1', 'inserted s2') ON CONFLICT (blurt_and_lock(key)) DO UPDATE SET data = upserttest.data || ' with conflict update s2'; <waiting ...>
step controller_show: SELECT * FROM upserttest;
key data
pg_advisory_unlock
t
+s1: NOTICE: called for k1
+s1: NOTICE: blocking 2
step controller_unlock_2_3: SELECT pg_advisory_unlock(2, 3);
pg_advisory_unlock
t
+s2: NOTICE: called for k1
+s2: NOTICE: blocking 2
step controller_show: SELECT * FROM upserttest;
key data
pg_advisory_unlock
t
+s1: NOTICE: called for k1
+s1: NOTICE: blocking 2
+s1: NOTICE: called for k1
+s1: NOTICE: blocking 2
step s1_upsert: <... completed>
step controller_show: SELECT * FROM upserttest;
key data
step controller_show: SELECT * FROM upserttest;
key data
+s1: NOTICE: called for k1
+s1: NOTICE: blocking 3
step s1_upsert: INSERT INTO upserttest(key, data) VALUES('k1', 'inserted s1') ON CONFLICT (blurt_and_lock(key)) DO UPDATE SET data = upserttest.data || ' with conflict update s1'; <waiting ...>
+s2: NOTICE: called for k1
+s2: NOTICE: blocking 3
step s2_upsert: INSERT INTO upserttest(key, data) VALUES('k1', 'inserted s2') ON CONFLICT (blurt_and_lock(key)) DO UPDATE SET data = upserttest.data || ' with conflict update s2'; <waiting ...>
step controller_show: SELECT * FROM upserttest;
key data
pg_advisory_unlock
t
+s1: NOTICE: called for k1
+s1: NOTICE: blocking 2
step controller_unlock_2_3: SELECT pg_advisory_unlock(2, 3);
pg_advisory_unlock
t
+s2: NOTICE: called for k1
+s2: NOTICE: blocking 2
step controller_show: SELECT * FROM upserttest;
key data
pg_advisory_unlock
t
+s2: NOTICE: called for k1
+s2: NOTICE: blocking 2
+s2: NOTICE: called for k1
+s2: NOTICE: blocking 2
step s2_upsert: <... completed>
step controller_show: SELECT * FROM upserttest;
key data
step s1_begin: BEGIN;
step s2_begin: BEGIN;
+s1: NOTICE: called for k1
+s1: NOTICE: blocking 3
step s1_upsert: INSERT INTO upserttest(key, data) VALUES('k1', 'inserted s1') ON CONFLICT (blurt_and_lock(key)) DO UPDATE SET data = upserttest.data || ' with conflict update s1'; <waiting ...>
+s2: NOTICE: called for k1
+s2: NOTICE: blocking 3
step s2_upsert: INSERT INTO upserttest(key, data) VALUES('k1', 'inserted s2') ON CONFLICT (blurt_and_lock(key)) DO UPDATE SET data = upserttest.data || ' with conflict update s2'; <waiting ...>
step controller_show: SELECT * FROM upserttest;
key data
pg_advisory_unlock
t
+s1: NOTICE: called for k1
+s1: NOTICE: blocking 2
step controller_unlock_2_3: SELECT pg_advisory_unlock(2, 3);
pg_advisory_unlock
t
+s2: NOTICE: called for k1
+s2: NOTICE: blocking 2
step controller_show: SELECT * FROM upserttest;
key data
pg_advisory_unlock
t
+s2: NOTICE: called for k1
+s2: NOTICE: blocking 2
+s2: NOTICE: called for k1
+s2: NOTICE: blocking 2
step controller_show: SELECT * FROM upserttest;
key data
step s1_commit: COMMIT;
+s2: NOTICE: called for k1
+s2: NOTICE: blocking 2
step s2_upsert: <... completed>
step controller_show: SELECT * FROM upserttest;
key data
delete from test1;
commit;
perform pg_advisory_lock(1);
- raise notice 'x = %', x;
+ raise notice 'length(x) = %', length(x);
end;
$$;
<waiting ...>
pg_advisory_unlock
t
+s1: NOTICE: length(x) = 6000
step assign1: <... completed>
starting permutation: lock assign2 vacuum unlock
delete from test1;
commit;
perform pg_advisory_lock(1);
- raise notice 'x = %', x;
+ raise notice 'length(x) = %', length(x);
end;
$$;
<waiting ...>
pg_advisory_unlock
t
+s1: NOTICE: length(x) = 6000
step assign2: <... completed>
starting permutation: lock assign3 vacuum unlock
delete from test1;
commit;
perform pg_advisory_lock(1);
- raise notice 'r = %', r;
+ raise notice 'length(r) = %', length(r::text);
end;
$$;
<waiting ...>
pg_advisory_unlock
t
+s1: NOTICE: length(r) = 6004
step assign3: <... completed>
starting permutation: lock assign4 vacuum unlock
delete from test1;
commit;
perform pg_advisory_lock(1);
- raise notice 'r = %', r;
+ raise notice 'length(r) = %', length(r::text);
end;
$$;
<waiting ...>
pg_advisory_unlock
t
+s1: NOTICE: length(r) = 6004
step assign4: <... completed>
starting permutation: lock assign5 vacuum unlock
delete from test1;
commit;
perform pg_advisory_lock(1);
- raise notice 'r = %', r;
+ raise notice 'length(r) = %', length(r::text);
end;
$$;
<waiting ...>
pg_advisory_unlock
t
+s1: NOTICE: length(r) = 6002
step assign5: <... completed>
DROP TABLE part2;
COMMIT;
-WARNING: skipping vacuum of "part2" --- relation no longer exists
+s2: WARNING: skipping vacuum of "part2" --- relation no longer exists
step vac_specified: <... completed>
starting permutation: lock vac_all_parts drop_and_commit
DROP TABLE part2;
COMMIT;
-WARNING: skipping analyze of "part2" --- relation no longer exists
+s2: WARNING: skipping analyze of "part2" --- relation no longer exists
step analyze_specified: <... completed>
starting permutation: lock analyze_all_parts drop_and_commit
DROP TABLE part2;
COMMIT;
-WARNING: skipping vacuum of "part2" --- relation no longer exists
+s2: WARNING: skipping vacuum of "part2" --- relation no longer exists
step vac_analyze_specified: <... completed>
starting permutation: lock vac_analyze_all_parts drop_and_commit
static int step_bsearch_cmp(const void *a, const void *b);
static void printResultSet(PGresult *res);
+static void isotesterNoticeProcessor(void *arg, const char *message);
+static void blackholeNoticeProcessor(void *arg, const char *message);
/* close all connections and exit */
static void
}
/*
- * Suppress NOTIFY messages, which otherwise pop into results at odd
- * places.
+ * Set up notice processors for the user-defined connections, so that
+ * messages can get printed prefixed with the session names. The
+ * control connection gets a "blackhole" processor instead (hides all
+ * messages).
*/
- res = PQexec(conns[i], "SET client_min_messages = warning;");
- if (PQresultStatus(res) != PGRES_COMMAND_OK)
- {
- fprintf(stderr, "message level setup failed: %s", PQerrorMessage(conns[i]));
- exit_nicely();
- }
- PQclear(res);
+ if (i != 0)
+ PQsetNoticeProcessor(conns[i],
+ isotesterNoticeProcessor,
+ (void *) (testspec->sessions[i - 1]->name));
+ else
+ PQsetNoticeProcessor(conns[i],
+ blackholeNoticeProcessor,
+ NULL);
/* Get the backend pid for lock wait checking. */
res = PQexec(conns[i], "SELECT pg_backend_pid()");
if (waiting) /* waiting to acquire a lock */
{
+ /*
+ * Since it takes time to perform the lock-check query,
+ * some data --- notably, NOTICE messages --- might have
+ * arrived since we looked. We must call PQconsumeInput
+ * and then PQisBusy to collect and process any such
+ * messages. In the (unlikely) case that PQisBusy then
+ * returns false, we might as well go examine the
+ * available result.
+ */
+ if (!PQconsumeInput(conn))
+ {
+ fprintf(stderr, "PQconsumeInput failed: %s\n",
+ PQerrorMessage(conn));
+ exit(1);
+ }
+ if (!PQisBusy(conn))
+ break;
+
+ /*
+ * conn is still busy, so conclude that the step really is
+ * waiting.
+ */
if (!(flags & STEP_RETRY))
printf("step %s: %s <waiting ...>\n",
step->name, step->sql);
printf("\n");
}
}
+
+/* notice processor, prefixes each message with the session name */
+static void
+isotesterNoticeProcessor(void *arg, const char *message)
+{
+ printf("%s: %s", (char *) arg, message);
+}
+
+/* notice processor, hides the message */
+static void
+blackholeNoticeProcessor(void *arg, const char *message)
+{
+ /* do nothing */
+}
delete from test1;
commit;
perform pg_advisory_lock(1);
- raise notice 'x = %', x;
+ raise notice 'length(x) = %', length(x);
end;
$$;
}
delete from test1;
commit;
perform pg_advisory_lock(1);
- raise notice 'x = %', x;
+ raise notice 'length(x) = %', length(x);
end;
$$;
}
delete from test1;
commit;
perform pg_advisory_lock(1);
- raise notice 'r = %', r;
+ raise notice 'length(r) = %', length(r::text);
end;
$$;
}
delete from test1;
commit;
perform pg_advisory_lock(1);
- raise notice 'r = %', r;
+ raise notice 'length(r) = %', length(r::text);
end;
$$;
}
delete from test1;
commit;
perform pg_advisory_lock(1);
- raise notice 'r = %', r;
+ raise notice 'length(r) = %', length(r::text);
end;
$$;
}
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