I am using vsql.exe on an external Vertica database for which I don't have any administrative access. I use some views with simple SELECT+FROM+WHERE queries.
These queries 90% of the time work just fine, but some times, randomly, I get this error:
ERROR 3326: Execution time exceeded run time cap of 00:00:45
The strange thing is that this error can happen way after those 45 seconds, even after 3 minutes. I've been told this is related to having different resource pools, but anyway I don't want to dig into that.
The problem is that when this occurs, vsql.exe returns errorlevel 0 and there is (apparently almost) no way to know this failed.
The output of the query is stored in a csv file. When it succeeds, it ends with (#### rows). But when it fails with this error, it just stops at any point of the csv, and its resulting size is around half of what's expected. This is of course not what you would expect when an error occurs, like no output or an empty one.
If there is a connection error or if the query has syntax errors, the errorlevel is not 0, so in those cases it behaves as expected.
I've tried many things, like increasing the timeout or adding -v ON_ERROR_STOP=ON to the vsql.exe parameters, but none of that helped.
I've googled a lot and found many people having this error, but the solutions are mostly related to increasing the timeouts, not related to the errorlevel returned.
Any help will be greatly appreciated.
TL;DR: how can I detect an error 3326 in a batch file like this?
#echo off
vsql.exe -h <hostname> -U <user> -w <pwd> -o output.cs -Ac "SELECT ....;"
echo %errorlevel% is always 0
if errorlevel 1 echo Error!! But this is never displayed.
Now that's really unexpected to me. I don't have Windows available just now, but trying on my Mac - at first just triggering a deliberate error:
$ vsql -h zbook -d sbx -U dbadmin -w $VSQL_PASSWORD -v ON_ERROR_STOP=ON -Ac "select * from foobarfoo"
ERROR 4566: Relation "foobarfoo" does not exist
$ echo $?
1
With ON_ERROR_STOP set to ON, this should be the behaviour everywhere.
Could you try what I did above through Windows, just with echo %ERRORLEVEL% instead of echo $?, just from the Windows command prompt and not in a batch file?
Next test: I run on resource pool general in my little test database, so I temporarily modify it to a runtime cap of 30 sec, run a silly query that will take over 30 seconds with ON_ERROR_STOP set to ON, collect the value returned by vsql and set the runtime cap of general back to NONE. I also have the %VSQL_* % env variables set so I don't have to repeat them all the time:
rem Windows way to set environment variables for vsql:
set VSQL_HOST=zbook
set VSQL_DATABASE=sbx
set VSQL_USER=dbadmin
set VSQL_PASSWORD=***masked***
Now for the test (backslashes, in Linux/MacOs escape a new line, which enables you to "word wrap" a shell command. Use the caret (^) in Windows for that):
marco ~/1/Vertica/supp $ # set a runtime cap
marco ~/1/Vertica/supp $ vsql -i -c \
"alter resource pool general runtimecap '00:00:30'"
ALTER RESOURCE POOL
Time: First fetch (0 rows): 116.326 ms. All rows formatted: 116.730 ms
marco ~/1/Vertica/supp $ vsql -v ON_ERROR_STOP=ON -iAc \
"select count(*) from one_million_rows a cross join one_million_rows b"
ERROR 3326: Execution time exceeded run time cap of 00:00:30
marco ~/1/Vertica/supp $ # test the return code
marco ~/1/Vertica/supp $ echo $?
1
marco ~/1/Vertica/supp $ # clear the runtime cap
marco ~/1/Vertica/supp $ vsql -i -c \
"alter resource pool general runtimecap NONE "
ALTER RESOURCE POOL
Time: First fetch (0 rows): 11.148 ms. All rows formatted: 11.383 ms
So it works in my case. Your line:
if errorlevel 1 echo Error!! But this is never displayed.
... never echoes anything because the previous line, with echo will return 0 to the shell, overriding the previous errorlevel.
Try it command by command on your Windows command prompt, and see what happens. Just echo %errorlevel%, without evaluating it.
And I notice that you are trying to export to CSV format. Then, try this:
Format the output unaligned (-A)
set the field separator to comma (-F ',')
remove the footer '(n rows)' (-P footer)
limit the output to 5 rows in the query for test
(I show the output before redirecting to file):
marco ~/1/Vertica/supp $ vsql -A -F ',' -P footer -c "select * from one_million_rows limit 5"
id,id_desc,dob,category,busid,revenue
0,0,1950-01-01,1,====== boss ========,0.000
1,-1,1950-01-02,2,kbv-000001kbv-000001,0.010
2,-2,1950-01-03,3,kbv-000002kbv-000002,0.020
3,-3,1950-01-04,4,kbv-000003kbv-000003,0.030
4,-4,1950-01-05,5,kbv-000004kbv-000004,0.040
Not aligning is much faster than aligning.
Then, as you spend most time in the fetching of the rows (that's because you get a timeout in the middle of an output file write process), try fetching more rows at a time than the default 1000. You will need to play with the value, depending on the network settings at your site until you get your best value:
-v ROWS_AT_A_TIME=10000
Once you're happy with the tested output, try this command (change the SELECT for your needs, of course ....):
marco ~/1/Vertica/supp $ vsql -A -F ',' -P footer \
-v ON_ERROR_STOP=ON -v ROWS_AT_A_TIME=10000 -o one_million_rows.csv \
-c "select * from one_million_rows"
marco ~/1/Vertica/supp $ wc -l one_million_rows.csv
1000001 one_million_rows.csv
The table actually contains one million rows. Note the line count in the file: 1,000,001. That's the title line included, but the footer (1000000 rows) removed.
We use CppUTest to run unit tests.
This is being performed by Cmake/Ninja where after building the tests, we use ninja to execute them ninja test
an example output of this is:
1/3 Test #1: Test1................................................... Passed 0.03 sec
Start 2: Test2
2/3 Test #2: Test2......................................................... Passed 0.00 sec
Start 3: Test3
3/3 Test #3: Test3..............................................................***Exception: SegFault 0.00 sec
66% tests passed, 1 tests failed out of 3
Total Test time (real) = 0.26 sec
The following tests FAILED:
3 - Test3 (SEGFAULT)
Errors while running CTest
FAILED: CMakeFiles/test.util
This is ok if i trigger the build locally on my machine and analyze it manually. Now what i am looking for is an already existing solution to help jenkins analyze the output.
Right now, Jenkins executes the build and exits "successfully", because the command itself ninja test executed successfully, but not all of the tests.
Maybe you already found this but you can create a JUnit output with cpputest with the -ojunit output flag. Jenkins should then be able to import the results from this file.
CppUTest Commandline Switches
Doing some proof of concept I've a simple netcore repo with some xUnit tests at NetCoreXunit that I've got to build on both Appveyor and Travis. I've put in a failing test and Appveyor fails the build but I'm struggling to get Travis to do the same. It executes the tests happily and reports one of the tests fails but passes the build.
I've Googled to death and been trying to pipe and parse the output in a script step in the yaml configuration but my script knowledge is not great.
If anyone could help me get Travis to fail the build I'd be grateful. There's a link from the GitHub repo to both my Appveyor and Travis builds and if you commit to the repo it should build automatically.
--UPDATE--
So I got it as far as parsing the output of two test assemblies and correctly identifying if there's been a test failure; but I need to create a variable so both assemblies get tested before throwing the exit. I've had to jump through silly hoops to get this far; and one was I can't seem to define a variable without Travis complaining. It's also hardcoded and I'd like to extend it to finding all test assemblies not just the hardcoded.
after_success:
# Run tests
- dotnet test ./src/NetCoreXunit -xml ./out/NetCoreXunit.xml;
if grep -q 'result="Fail"' ./out/NetCoreXunit.xml ; then
echo 'Failed tests detected.';
else
echo 'All tests passed.';
fi;
- dotnet test ./src/NetCoreXunitB -xml ./out/NetCoreXunitB.xml;
if grep -q 'result="Fail"' ./out/NetCoreXunitB.xml ; then
echo 'Failed tests detected.';
else
echo 'All tests passed.';
fi;
Any advice appreciated: how do I get a list of all test assemblies and how do I declare and set a bool that I can then exitcode with?
Spent way to long trying to get .travis.yml to work; should have just gone straight down the Python route; works as follows called out to from the yml.
import os
import sys
import re
from subprocess import call
root_directory = os.getcwd()
print (root_directory)
regexp = re.compile(r'src[\/\\]NetCoreXunit.?$')
result = False
for child in os.walk(root_directory):
print (child[0])
if regexp.search(child[0]) is not None:
print ("Matched")
test_path = os.path.join(root_directory, child[0])
if os.path.isdir(test_path):
print ("IsDir")
print (test_path)
os.chdir(test_path)
call (["dotnet", "test", "-xml", "output.xml"])
if 'result="Fail"' in open("output.xml").read():
print (test_path + ": Failed tests detected")
result = True
else:
print (test_path + ": All tests passed")
os.chdir(root_directory)
if result:
print ("Failed tests detected")
sys.exit(1)
Can you help me, why I get sometimes (50:50):
webkit_server.NoX11Error: Cannot connect to X. You can try running with xvfb-run.
When I start the script in parallel as:
xvfb-run -a python script.py
You can reproduce this yourself like so:
for ((i=0; i<10; i++)); do
xvfb-run -a xterm &
done
Of the 10 instances of xterm this starts, 9 of them will typically fail, exiting with the message Xvfb failed to start.
Looking at xvfb-run 1.0, it operates as follows:
# Find a free server number by looking at .X*-lock files in /tmp.
find_free_servernum() {
# Sadly, the "local" keyword is not POSIX. Leave the next line commented in
# the hope Debian Policy eventually changes to allow it in /bin/sh scripts
# anyway.
#local i
i=$SERVERNUM
while [ -f /tmp/.X$i-lock ]; do
i=$(($i + 1))
done
echo $i
}
This is very bad practice: If two copies of find_free_servernum run at the same time, neither will be aware of the other, so they both can decide that the same number is available, even though only one of them will be able to use it.
So, to fix this, let's write our own code to find a free display number, instead of assuming that xvfb-run -a will work reliably:
#!/bin/bash
# allow settings to be updated via environment
: "${xvfb_lockdir:=$HOME/.xvfb-locks}"
: "${xvfb_display_min:=99}"
: "${xvfb_display_max:=599}"
# assuming only one user will use this, let's put the locks in our own home directory
# avoids vulnerability to symlink attacks.
mkdir -p -- "$xvfb_lockdir" || exit
i=$xvfb_display_min # minimum display number
while (( i < xvfb_display_max )); do
if [ -f "/tmp/.X$i-lock" ]; then # still avoid an obvious open display
(( ++i )); continue
fi
exec 5>"$xvfb_lockdir/$i" || continue # open a lockfile
if flock -x -n 5; then # try to lock it
exec xvfb-run --server-num="$i" "$#" || exit # if locked, run xvfb-run
fi
(( i++ ))
done
If you save this script as xvfb-run-safe, you can then invoke:
xvfb-run-safe python script.py
...and not worry about race conditions so long as no other users on your system are also running xvfb.
This can be tested like so:
for ((i=0; i<10; i++)); do xvfb-wrap-safe xchat & done
...in which case all 10 instances correctly start up and run in the background, as opposed to:
for ((i=0; i<10; i++)); do xvfb-run -a xchat & done
...where, depending on your system's timing, nine out of ten will (typically) fail.
This questions was asked in 2015.
In my version of xvfb (2:1.20.13-1ubuntu1~20.04.2), this problem has been fixed.
It looks at /tmp/.X*-lock to find an available port, and then runs Xvfb. If Xvfb fails to start, it finds a new port and retries, up to 10 times.
In xcode it is a good idea to generate documentation during build your library.. I am using headerdoc2HTML command .. to make it run with build phase I've added it to build phase script (shell script) like this:
headerdoc2html -o "outputPath" "myHeader.h"
But it always gives me an error:
Command /bin/sh emitted errors but did not return a nonzero exit code to indicate failure
Even the documentation is generated but it gives me an error .. if I remove this command every thing goes fine!
I checked with -d parameter I did not get where is the error
Any help with that? is there a way to check if the command did not return 0 then don't show error (ignore all warnings and errors)?
EDIT:
I just made sure that the command is ok and no problem with it by doing this check:
if headerdoc2html -q -j -o "outputPath" "myHeader.h"
then
echo "Documents generated successfully!"
fi
While the problem is from the command it self and don't effect the over all build phase so it is good idea to not show the warnings and errors from headerdoc2html command.
The easiest way to do that is to hide any emitted errors from it like by redirect errors to null like this:
headerdoc2html -o "outputPath" "myHeader.h" >/dev/null 2>/dev/null