Unable to connect with MYSQL database.

Error:

Unknown character set index for field '255' received from server. (or)

Unknown initial character set index '255' received from server.

Note:

This is not specific to any build of Zoho Analytics Onpremise.
This fix is for MYSQL version 8 and below.

Analysis:

The customer's MySQL version to be higher than the version which is in our product.

Solution:

Stop the Zoho Analytics Server service.
Move the <Zoho Home>/Analytics/lib/mysql_connector.jar to <Zoho Home>/Analytics/Backup/
Download the latest MySQL jar from this link.
Extract it and rename mysql-connector-java-8.0.17.jar to mysql_connector.jar.
Move the renamed jar file to <Zoho Home>/Analytics/lib/ folder.
Start the service.

If the above still does not fix the issue and throws below error, check the log for the mentioned trace.

Log traces:

[14:00:11:936]|[11-26-2019]|[SYSERR]|[INFO]|[91]:
ERROROCCURED,'3470D4D513AC92FAA6AC922C4BAD16E8',54,'TESTANDFETCHTABLES',500,1574730011000,-1,'COMMON_INTERNAL_SERVER_ERROR',108,'','','','An unexpected error occurred while performing this operation.','https://l-adrien:8443/ZRCloudDBAction.ma','-','172.30.10.216','169.254.26.169_sas','-Not Provided-','ClassNotFoundException:org.gjt.mm.mysql.Driver at URLClassLoader.findClass(LN:381) at ClassLoader.loadClass(LN:424) at ClassLoader.loadClass(LN:357) at Class.forName0(LN:-2) at Class.forName(LN:264) at DirectDBConnection.getDBConnection(LN:34) at DirectDBConnection.<init>(LN:30) at ZRCloudDBAPI.getDBConnection(LN:3007) at ZRCloudDBAPI.getConnection(LN:1313) at ZRCloudDBAPI.getConnection(LN:1254) at ZRCloudDBAPI.getCloudDBTableNamesAsList(LN:1742) at ZRCloudDBAction.getTablesFromCloudDB(LN:291) at ZRCloudDBAction.execute(LN:89)','Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.108 Safari/537.36'

Analysis:

The classpath used is not present in the latest mysql_connector.jar.

Solution:

Stop the Zoho Analytics Onpremise service.
Replace this file (dbtypes.json) under <Zoho Home>/Analytics/conf/ZohoDB/
Start the service.

Note:

This fix can be used for Zoho Analytics Onpremise version 4300 and below.

Zoho CRM Training Programs

Learn how to use the best tools for sales force automation and better customer engagement from Zoho's implementation specialists.

Redefine the way you work

with Zoho Workplace

Start your free trial

Zoho DataPrep Personalized Demo

If you'd like a personalized walk-through of our data preparation tool, please request a demo and we'll be happy to show you how to get the best out of Zoho DataPrep.

Create, share, and deliver

beautiful slides from anywhere.

Get Started Now

Zoho Sign now offers specialized one-on-one training for both administrators and developers.

BOOK A SESSION

Zoho Workerly Home
Forums
Connect With Us:

Zoho Recruit Home
Forums
Connect With Us:

Start tracking your website metrics today

Use PageSense to understand what your visitors are looking for, how they are behaving, and where they are facing problems on your website.

Ready to improve your website's performance?

Install the PageSense code snippet on your site in a matter of minutes and start collecting in-depth data about the website visitors to grow your business.

Track and measure every business goal

Set up goals in PageSense to measure every single action performed by visitors on your website like button or link clicks, form submissions, and page engagements.

Understand the customer journey on your website

Create funnels in PageSense to quickly see which pages visitors use to enter your website, where they navigate to next, and which pages they decide to leave without converting.

Visualize your visitor's behavior with color codes

Set up heatmaps in PageSense to see where users have clicked more, how far they've scrolled, and on which parts of a page they've spent the most time using color-coded patterns in reports.

Measure customer engagement with your web forms

Use form analytics in PageSense to see how people interact with different fields in your form, whether they complete the form successfully or not, and where exactly they drop out on your form.

Record real visitor interactions on your website

Use session recordings in PageSense to watch a video of all the visitor actions performed on your website including the pages they navigate, the buttons they click, the UX issues they face, and more.

Test and optimize webpages for better conversions

Run A/B or Split URL tests in PageSense to figure out which version of your web page works best for your business and results in the best conversion rate.

Give each customer a unique website experience

Use personalization in PageSense to deliver customized versions of your website for every individual customer based on their demographics, local weather, browsing history, and more.

Grow your business through customer feedback

Run polls on your website using PageSense to understand what your customers think about your products/services and what needs improvement on your site.

Send timely updates that customers love

Use web push notifications in PageSense to schedule and notify your customers about an upcoming flash sale, product releases, promotional coupons, and a lot more that can spark conversions on your website.

Advertise your business to website visitors

Use pop-ups in PageSense to instantly grab the attention of visitors by showing attractive signup offers, coupon code discounts, or email newsletters that can eventually convert them into subscribers.

Access more advanced settings in PageSense

Use PageSense's advanced features like creating mutually exclusive groups, enabling cross-domain tracking, configuring customized project JS, and more to get deeper insights about your website.

Try easy-to-use extensions

Download the PageSense extension app available for your web browser with a few clicks and start collecting all of your required website metrics in real time.

Discover your favorite integrations with PageSense

Get a deeper look at your website's data by seamlessly integrating PageSense with a host of popular third-party apps like Google Analytics, Mixpanel, Intercom, and more.

Quick Links	Workflow Automation	Data Collection
Web Forms	Enterprise	Begin Data Collection
Interactive Forms	Workplace	Data Collection App
Offline Forms	Customer Service	Accessible Forms
Digital Forms	Marketing	Forms for Small Business
HTML Forms	Education	Forms for Enterprise
Contact Forms	E-commerce
Lead Generation Forms	Healthcare
Wordpress Forms	Customer onboarding
No Code Forms	Construction
Free Forms	Travel
Prefill Forms	Non-Profit
Intake Forms	Legal
Form Designer	HR
Card Forms	Food
Assign Forms	Photography
Translate Forms	Real Estate
Electronic Forms
Notification Emails for Forms
Holiday Forms
Form to PDF
Email Forms CRM Forms Embeddable Forms Drag and Drop form builder HIPAA Forms

New to Zoho CRM Plus?

Deliver unforgettable customer experiences

ACCESS ZOHO CRM PLUS

New to Zoho CRM Plus?

Deliver unforgettable customer experiences

ACCESS ZOHO CRM PLUS

New to Zoho Marketing Plus?

Everything you need to run your marketing

ACCESS ZOHO MARKETING PLUS

New to Zoho Marketing Plus?

Everything you need to run your marketing

ACCESS ZOHO MARKETING PLUS

Zoho Pagesense Resources

You are currently viewing the help pages of Qntrl’s earlier version. Click here to view our latest version—Qntrl 3.0's help articles.

New to Zoho Survey?

Access Zoho Survey

Latest Feature Updates

Explore our Pricing & Plans

Zoho Survey Resources

Android Mobile Surveys

Insurvey Blogs

Insight Blogs

Tips & Tricks

New to Zoho Social?

Manage your brands on social media

Access Zoho Social

Zoho Desk Resources

Desk Community Learning Series
Digest
Functions
Meetups
Kbase
Resources
Glossary
Desk Marketplace
MVP Corner
Word of the Day

Zoho Sheet Resources

New to Zoho Forms?

Latest Feature Updates

Explore our Pricing & Plans

Zoho Forms Resources

Secure your business

communication with Zoho Mail

Get started

Mail on the move with

Zoho Mail mobile application

Go Mobile

Stay on top of your schedule

at all times

Get started

Carry your calendar with you

Anytime, anywhere

Get started

Latest Announcements

New to Zoho Sign?

Zoho Sign Resources

Sign, Paperless!

Sign and send business documents on the go!

Get Started Now

Zoho SalesIQ Resources

New to Zoho TeamInbox?

Zoho TeamInbox Resources

Connect with us

New to Zoho ZeptoMail?

LEARN MORE

Latest Feature Updates

Zoho DataPrep Resources

New to Zoho DataPrep?

Access Zoho DataPrep

Zoho DataPrep Demo

Get a personalized demo or POC

Design. Discuss. Deliver.

Create visually engaging stories with Zoho Show.

Get Started Now

New to Zoho Workerly?

Access Zoho Workerly

New to Zoho Recruit?

Access Zoho Recruit

New to Zoho CRM?

Signup Now

Access Zoho CRM

Latest Feature Updates

New to Zoho Projects?

Access Zoho Projects

New to Zoho Sprints?

Access Zoho Sprints

New to Zoho Assist?

Access Zoho Assist

New to Bigin?

Signup Now

Access Bigin

Latest Feature Updates

Related Articles
Unable to Connect to the Postgres SQL Database from Command Prompt
Issue : Unable to Connect to the Postgres SQL Database from Command Prompt Error : Analysis : IPv6 local connections are commented in <AnalyticsPlus home>\pgsql\data\pg_hba.conf file Solution : Open the file using notepad or wordpad as administrator ...
How to connect to Zoho Analytics database
This article will help you with the steps to connect to Analytics Plus database(Postgres) Note: Analytics Plus is bundled with Postgres and it cannot be changed to any other database due to reliability and chart rendering. Steps for Windows: 1. Open ...
Unable to see Create Database Icons
Issue: When Analytics Plus Professional edition is rebranded, the Create Database Icons on the home page disappears. Build: 2905 or less Solution: Though the identified issue is resolved in the latest builds 2906 or above, we need to perform a minor ...
Prerequisites to ensure database connectivity
In order to connect to a database, there are some prerequisites that must be met. Common prerequisites The following prerequisites are applicable to all databases. Provide database read permissions to the Zoho Analytics server. Ensure you have the ...
Import data from Rackspace Cloud MySQL
If you have your data stored in Rackspace Cloud MySQL cloud database, you can easily import the data into Zoho Analytics or connect live with the Rackspace Cloud MySQL server for advanced reporting and analysis. Data Import: Data from your cloud ...