How Do You Find the Health Status of a Jira Cluster in the Web UI?

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Problem scenario
When you logged into the web UI for Jira you saw one or more error messages.  How do you find out of the error is still valid?

You want to find the web UI page in Jira that will tell you about the health of the cluster for one of the following error categories:

-Supported platforms
-Database
-File system
-Indexing
-Attachments
-Cluster
-Secondary Storage

Where do you go to view the status of detected problems or potentially detected problems?

…

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How Do You Troubleshoot a Process in Linux That Seems to Hang Forever?

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Problem scenario
You have a long-running process that seems to not be progressing.  The problem is reoccurring.  How do you troubleshoot it?

Possible solution #1
Start a duplicate terminal session.  Use “sudo ps -evf | grep foobar” where “foobar” is the name of the process.  Try the “top” command to see if the are memory or CPU constraints.  Other commands that may be useful are: strace, 

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How Do You Troubleshoot the NFS Message About “Transaction order is cyclic”?

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Problem scenario
You try to start the NFS service with a command like this: sudo systemctl start nfs.service

However you get an error like this:  “Failed to start nfs.service: Transaction order is cyclic.  See system logs for details.  See system logs and ‘systemctl status nfs.service’ for details.”

Possible Solution #1
Modify the /etc/fstab file.  Is it corrupt?  You may need to remove recently added entries and reboot the server.

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How Do You Instantiate a class in Python?

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Problem scenario
You inherited code from a different programmer. You want to test out an object. How do you create an object of a pre-made class?

Solution
Look at how many variables the class has. Take this code for example:

class Cartesian(object):
def __init__(self,a = 0,b = 0):
self.a = a
self.b = b

def distance(self):
return (self.a**2 + self.b**2) ** 0.5 # Pythagorean theorem. …

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How Do You Troubleshoot the Error “rsync mkdir failed… rsync error in rsync protocol data stream (code 12)”?

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Problem scenario
You try to use rsync or you use Ansible’s synchronize module.  It fails with this message: “rsync mkdir failed… rsync error in rsync protocol data stream (code 12)”

Solution
Is the destination directory writable?  Verify that the destination exists and has the correct permissions for being able to write to it with the user the Ansible playbook uses.

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How Do You Address a Problem Message about a Directory Being Read-only when It Is Not Read-only?

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Problem scenarios
One or both of the following applies to your situation:

#1  In Linux you try to move a directory that is not read only (e.g., its permissions are rwxrwxrwx or 777).  You get an error about it being read-only.  Your user is the owner of the directory.  

OR

#2  You are running an Ansible playbook and trying to change the attributes of the file. 

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How Do You Solve an Ansible Problem about an SSL Certificate Error?

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Problem scenario
You run an Ansible playbook.  You receive an error about the SSL certificate not being valid.  What should you do to get the playbook to transfer a file from a website using SSL or TLS to a managed node?

Possible Solution #1
If the problem pertains to retrieving a file from a website URL, this may apply. If the problem is between the managed node and the website and not between the control node and the website,

…

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What Should You Do When Linux Is Not Finding Your USB Camera?

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Problem scenario
In Linux in the /dev/ directory you looked for the camera.  In /dev/ and could not find a file associated with your web camera.  You verified the locally attached camera is connected via a USB cable to your physical computer.  

When you try to use it, you see this message:

“— Opening /dev/video0…
stat: No such file or directory”

What should you do?

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How Do You Get a Jira Instance to Work when The Web UI is Not Working but The Listener is Active on The TCP/IP port?

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Problem scenario
A Jira deployment is failing.  The web services are listening on port 8080 or whichever port you configured.  But the web UI does not load.  What should you do?

Solution
Root cause: “…JIRA is not designed to import data from a new version into an older version.” taken from Atlassian’s website.

Has the database been used in the past? 

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