We are a big org and we use Python Zope. We have naturally two versions: prod and dev. In production I understand due to security reasons we should not show error log to end users, but how do I do that for dev? It is very cumbersome to check the error log manually every time I get an internal server error.
Can I dump the error log directly onto the browser?
Zope v. 4.6.2
Python v. 3.8.0b2 (default, Jul 9 2019, 16:47:40) [GCC 4.8.5]
As far as I remember, Zope is using Products.SiteErrorLog for logging errors.
Afair on startup, Zope created a SiteErrorLog on startup, which you could customize. Back then I customized it in such a way that admin accounts could view the traceback in the browser, both for staging and production environments.
On my local developer box, I started Zope in foreground mode, which directly printed all errors to my terminal, without the need to look in logs.
If you cannot manage to configure the error log, I would suggest to create an issue at https://github.com/zopefoundation/Products.SiteErrorLog or ask your question again at https://community.plone.org/ (tag: Zope) which is the most active Plone/Zope community online.
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I have made a flask application at my local computer in the debugging mode and it runs all fine. But when it comes to production, the website gives me 500 or internal server error, which I have no idea what the bug is. I am fairly new to flask production and this has been stopping me from moving forward for quite a few days.
My questions are:
1> in my local development environment, one could always print things out. But how can I see those prints in the production stage?
2> Do I see them through Apache2 log? Where is Apache2 log?
For production, I actually followed the tutorials from pythonprogramming.net. Youtube link is here:
https://www.youtube.com/watch?v=qZNL4Ku1UQg&list=PLQVvvaa0QuDc_owjTbIY4rbgXOFkUYOUB&index=2
To use a very simple example, if the code imports a package which wasn't installed, where can we see the errors?
Thanks in advance.
I've tried to use to use try ... except block for every flask function. Whenever there is an exception, it can be return to the front-end. But what about other errors?
I found out:
Use logging module
Read apache2 log from /var/log/apache2
On a new installation of cassandra 3.0.20 on redhat 7 I can not list roles. I have tried the option of fixing /etc/alternatives/cassandra/cassandra.yaml with...
authenticator: PasswordAuthenticator
and then restart the service.
still when I run a simple command like LIST ROLES I get the following error.
cassandra#cqlsh> list roles;
Unauthorized: Error from server: code=2100 [Unauthorized] message="You have to be logged in and not anonymous to perform this request"
It turns out that systemctl was not completely stopping cassandra due to weirdness with Redhat 7 and the init file. Therefore the changes to my cassandra.yaml were not taking effect.
Once I killed cassandra, made a proper cassandra.service and restarted the desired settings took effect, and I am able to run operations like "LIST ROLES;" normally.
with a new project we encountered some strange behaviour on our ColdFusion application.
Whenever a single request is initiated from the browser, the code of the cfml-templates is
executed multiple times. Upon viewing the corresponding log-files we found out, that indeed
for some reason the same request fires the evaluation in our application multiple times. One request
generates several entries. This is especially the case for long-running requests, such as database imports.
The ColdFusion application implements a REST-service, but even on manually requesting a resource,
such as a certain cfml page, on the same application - the code gets executed an unknown amount of times(variable initializations, database write-operations etc. take place), and if the request runs too long (cap at around ~4-6 seconds) there is no response to the browser.
About the infrastructure:
The application is Coldfusion18 with Tomcat Standard Edition
The webserver is an Apache (2.4.6).
Everything runs on a Linux machine with Cent OS 7.7
The corresponding Java version is 11.0.4
Our best guess is that there might be some misscommunication between the coldfusion connector with
the apache webserver. We actually searched for some configuration parameters that could cause the
problem, without success. Upon an installation on a windows machine we did not encounter that error.
Anyone got any idea?
we just found our answer in the following post:
Link to Solution
Firstly, there are related posts:
GlassFish Server update center installation times out
Java EE 7 updatetool installation fails
I got my Java EE 7 SDK (Update 3) from here: http://www.oracle.com/technetwork/java/javaee/downloads/index.html
I have tried each of the solutions in the above posts and here: https://blogs.oracle.com/dipol/troubleshooting-glassfish-update-center
Including:
In the cmd prompt running set PKG_CLIENT_CONNECT_TIMEOUT=300 and set PKG_CLIENT_READ_TIMEOUT=300 before updatetool in C:\glassfish4\bin\updatetool.bat (c:\glassfish4 in my install directory - all settings were default, including install update tool...).
Set above mentioned timeout to much larger values - doesn't appear to make a difference at all, the process basically bombs immediately.
Running C:\glassfish4\bin\updatetool.bat many times.
Triple checking that I didn't somehow configure a proxy server in my sleep.
Use the update tool via the Glassfish admin console at http://localhost:4848 (seems to show no available update or add-ons, which seems odd..)
I get the following screenshot when I run C:\glassfish4\bin\updatetool.bat
I have no idea why the error would be proxy related, unless it happened to be something on their end. Interestingly, If I go directly to the URL mentioned (via Chrome) I get the following page:
What could possibly be going wrong here?
The updatetool was a commercial feature of Oracle GlassFish. Any update functionality relied on Oracle providing a site where updates could be hosted. Since Oracle GlassFish is no longer supported, this site no longer exists so the updatetool won't work any more.
Rather than downloading GlassFish from Oracle, you should download it from the official open source site, hosted on GitHub. Alternatively, if you really do need support, you could try Payara Server which is open source, and derived from GlassFish, but has support available (disclaimer: I work for Payara)
As a newbie to Enterprise Applications I'm trying to get it done.
I developed an Enterprise application in Netbeans 7.1.2. It runs successfully using the default Glassfish server. With the need to change the server, I downloaded and installed Tomee+ server, and made some changes to make Tomee Manager Interface work on my system.
I deployed the .ear file (Glassfish server output) into Tomee+ by placing it in the Tomee webapps folder, with the server in the running state. It gets automatically deployed and appears in the Tomcat Web Application Manager interface.
Then, by providing the suitable path in the address bar, like http://localhost:8080/app-war/faces/app.xhtml, it provides the frontend screen but the backend process is not working if I click the submit button. Instead, it simply provides a status page, like HTTP Status 500 - javax.el.ELException: javax.ejb.EJBTransactionRolledbackException: Transaction was rolled back, presumably because setRollbackOnly was called during a synchronization.
My question is: what went wrong with the steps I took for deploying it in Tomee+ server?
no more verbose stack?
btw can you try to:
1) check you have in tomee.xml the line
2) put your ear in /apps/ instead of webapps/
The point is by default (can be configured with the snapshot/next release) tomee extracts the ear in a folder simply removing the extension (webapps/your-ear/ for instance) and then tomcat takes this folder as a webapp so your deployment is no more the one expected. That's why moving it over a folder not managed by tomcat (apps) is often enough.
That's said, Glassfish transaction management is sometimes too tolerant (why i ask the full stack you got).