general forum

4.10.0 has an unplanned potential breaking change - pdf footer wrong aligment

admin — Thu, 07 Aug 2025 08:24:12 GMT

You may experience a wrong footer alignment issue when updating to jsreport 4.10.0 in case you use the CSS code from our samples or the studio pdf utils quick action to add header/footer. You will notice this visually when the footer is at the top and not at the bottom.

The reason for this is not the jsreport itself but the Chromium 138 dependency update, which changed the CSS flexbox engine calculation. This caused the CSS used in our demos to position the footer to the bottom to stop working.

Fortunately, the fix is easy.
Find the template you merge as the header/footer and locate the following CSS

.main {
     ....
  height: 100%;
}

And change the 100% to 100vh

.main {
     ....
  height: 100vh;
}

Compress PDF

JannetGen — Sat, 11 Apr 2026 06:12:32 GMT

I’ve been looking into this as well. While using the pdf-utils and adjusting the pdfSettings in the configuration is the standard way to handle it within jsreport, sometimes the compression isn't as aggressive as I need for certain documents.
If you're just looking for a quick way to shrink a file down before sending it off and don't want to mess with the server-side code right now, I've found this tool pretty handy- https://www.thetoolapp.com/compress-pdf-file/. It’s been a life-saver for me when I'm in a rush.
Curious to see if anyone else has managed to get significantly smaller file sizes just by tweaking the internal jsreport chrome-pdf settings though!

How to split a PDF file to couples of small PDFs page by page?

JannetGen — Tue, 07 Apr 2026 08:01:17 GMT

If you’re looking to do this programmatically within jsreport, the script approach mentioned earlier is definitely the way to go for automation.
However, if you just need a quick way to split a specific file manually without messing with the code right now, I’ve used https://thetoolapp.com/utilities/split-files/ before. It’s pretty straightforward for splitting things page-by-page.

Fill pdf form

JannetGen — Mon, 06 Apr 2026 07:12:35 GMT

I’ve run into similar issues with field mapping in the past. If you're looking for a quick way to test the form structure or just need a straightforward way to see how the fields behave before automating the whole thing, I sometimes use this simple tool- https://thetoolapp.com/pdf-tools/fill-pdf-form/. It’s pretty handy for verifying the PDF side of things while you're debugging your jsreport script.

DocxImage in footer

JannetGen — Sat, 04 Apr 2026 12:13:01 GMT

That’s a classic challenge with Word-based reporting. Usually, when images aren't showing up in the footer, it’s because the docxImage helper is struggling with the specific scope of the footer part in the XML.
One thing that often helps is making sure the image data is already fully resolved in your data object before the rendering starts. Also, double-check that you're using a relatively small image file - sometimes the footer container in Word is a bit more sensitive to large base64 strings than the main body is. If you've already tried that, sometimes wrapping the image in a fixed-size table cell in the footer can help "force" the rendering engine to reserve the space properly!

I need to repeat the header em second page

JannetGen — Fri, 03 Apr 2026 12:35:33 GMT

If you are using the chrome-pdf recipe, the easiest way is usually to use the native 'Header' and 'Footer' templates in the jsreport studio. Anything you put in that header template section will automatically repeat on every page. Just make sure you leave enough margin in your main template so the header doesn't overlap with your content!

Report generation is very slow.

JannetGen — Thu, 02 Apr 2026 11:24:50 GMT

I’ve noticed that when jsreport starts lagging, it’s usually either a massive data object being passed to the template or Chrome's memory management hitting a wall.
One thing that really helped me was switching to the headless Chrome launch strategy in the config, or making sure I wasn't doing heavy data processing inside the Helpers - doing that before passing it to the engine makes a huge difference. Also, if you're using a lot of images or heavy CSS, try checking the "Scripts" execution time in the profiler; sometimes a single synchronous loop in a helper can hang the whole render.

Docxstyle background color issue

JannetGen — Thu, 02 Apr 2026 05:50:02 GMT

I’ve run into similar styling issues with docx templates before. Word can be really picky about how it interprets background colors compared to a standard browser. Sometimes the docxStyle doesn't apply correctly if there's conflicting 'shading' settings already in the Word document itself. It might be worth checking if the base table or cell in your .docx file has a default fill color set to 'None' or 'No Color' instead of being completely unstyled.

Group visibilityPermissions empty after import

JannetGen — Wed, 01 Apr 2026 09:33:28 GMT

That’s a strange one. I’ve seen similar issues with imports before where the core data moves over fine, but the metadata or link tables for permissions don’t seem to 'hook' correctly in the new environment.
Have you checked if the Group IDs in your export file actually match the IDs in the new instance? Sometimes if the groups aren't created in the exact same order or if they have different internal IDs, the permissions end up pointing to nothing. It might also be worth doing a quick check of the logs during the import to see if there are any 'foreign key' or 'unauthorized' errors popping up silently.

API call to assign user admin rights

JannetGen — Tue, 31 Mar 2026 08:30:06 GMT

That sounds like a permissions sync issue. Since you're working with the API to elevate rights, have you checked if the changes require a fresh session or a manual cache clear on the jsreport side?
Sometimes the internal store doesn't reflect the new role immediately via the UI even if the API call returns a success. It might be worth trying to re-authenticate the user after the call to see if the admin privileges kick in properly.

footer overflows to next page or writes multiple times

JannetGen — Fri, 27 Mar 2026 09:58:17 GMT

That’s a frustrating one, especially when it seems like the footer calculation is just slightly off. Have you tried wrapping the footer content in a fixed-height container or adjusting the marginTop and marginBottom in your Chrome-PDF recipe?
Sometimes Chrome’s rendering engine gets a bit confused with page-break logic if the footer content is too close to the edge. Shrinking the footer font or slightly increasing the bottom margin usually clears up those weird overflows.

119 x 32 1 Hidden Terminal give me a title: MongoServerError during import: "Given transaction number does not match any in-progress transactions"

admin — Wed, 25 Mar 2026 20:47:58 GMT

Thank you for the topic. I've tried to replicate the issue, but I can't reproduce it so far.

Some questions to help me isolate the problem...

Do you have authentication enabled?
Do you reproduce the same with the local mongo single node replica?
Could you upload somewhere an export with "many child entities" so we test on the same?

Create users in k8s deployment

JannetGen — Fri, 20 Mar 2026 12:39:49 GMT

The startup script idea mentioned here is probably your best bet for a stateless setup. You could essentially pack your user creation logic into a small script and run it via an initContainer or a post-start hook in your K8s deployment.
Another way to handle it without persistence is to use the jsreport CLI to import a prepared backup file (including the users) during the container's boot sequence. It keeps things clean and ensures your environment is identical every time it spins up.

XLSX template rendering issue

snowroad12 — Fri, 20 Mar 2026 10:00:57 GMT

Have you tried running the report with a simpler template or smaller data set to check if the issue is related to the complexity of the template or the size of the data?

Number of images in PDF

jb-liger_lectra1 — Thu, 19 Mar 2026 09:52:21 GMT

Thanks a lot for this explanation.

Version control revert issue

JannetGen — Thu, 19 Mar 2026 08:14:27 GMT

Reverting versions can definitely be a bit nerve-wracking when the UI doesn't seem to sync up right away. If you're still having trouble seeing the changes or just want to double-check the file structure before committing to another revert, I've found that using a quick online text or metadata extractor can help you verify exactly what's in the report definition. It’s a nice way to troubleshoot without cluttering your local environment.

Merge external PDF into recipe

JannetGen — Wed, 18 Mar 2026 07:09:39 GMT

I’ve run into similar issues when trying to pull in external PDFs that weren't generated by the same template. Using the pdf-utils 'merge' or 'append' operations is definitely the way to go, but it can get a bit finicky if the source files have different page sizes or metadata.
If you're still having trouble getting the pages to line up, one thing that helped me was to 'pre-process' the external files first to make sure they're cleaned up or split into the exact pages you need before calling them in the recipe. It’s a bit of an extra step, but it usually stops those weird layout shifts or empty pages from happening during the merge!

DeprecationWarning: Calling promisify on a function that returns a Promise is likely a mistake.

fmmich — Tue, 17 Mar 2026 20:36:33 GMT

I use "beforeRender" to get data from a database. My "beforeRender" looked like this:

async function beforeRender(req, res, done) { try { // get data async from database } catch (err) { // log errors to database return done(err); } done(); }

Since my "beforeRender" is async, @bjrmatos directed me to the fact that using "done" for an async "beforeRender" is no longer necessary. It appears that the third parameter for "done" is only necessary if "beforeRender" is not async.

File size of data/reports is getting large

JannetGen — Sat, 14 Mar 2026 12:43:34 GMT

That file is usually the internal reports store (depending on the provider you're using). If it keeps growing, it might be because report history/results are being persisted. You can limit or disable storing reports in the configuration (for example using the store settings or switching to a different persistence strategy). Also worth checking if there’s any cleanup/retention policy configured. Otherwise the file can grow pretty quickly over time.

Worker terminated due to reaching memory limit: JS heap out of memory

admin — Fri, 13 Mar 2026 10:10:44 GMT

We have fixed the performance regression issue for v2-based templates where there are no handlebars tags present in the xlsx file. In other words, for templates that use just xlsxAdd, xlsxMerge... transformations.

The fix is currently in the master branch waiting for the next release, however you can already test it in the docker nightly build

docker run -p 5488:5488 jsreport/jsreport:nightly

Does jsreport support multiple Identity Servers?

jitendra5792 — Thu, 12 Mar 2026 07:14:35 GMT

We have a scenario where two different Identity Servers are used in our environment. However, we would like to maintain only a single jsreport instance.

Is it possible to configure jsreport to accept authentication tokens from multiple Identity Servers simultaneously?

If this is not supported natively, are there any recommended approaches?

Random "Connection closed" error when running scheduled html-to-xlsx report

fmmich — Wed, 11 Mar 2026 15:36:57 GMT

Not easily, because the data comes from a database. I have upgraded this morning to Jsreport 4.12 and monitoring.

JSReport Puppeteer vulnerabilities

Owenpauly — Tue, 03 Mar 2026 10:35:00 GMT

I have the same issue

Release process regarding vulnerability fix PRs

admin — Mon, 02 Mar 2026 09:57:25 GMT

Automated audit tools can be useful, but they often report false positives. In large, dependency-heavy projects like jsreport, these reports frequently flag issues that are not exploitable in practice and therefore don’t always provide meaningful, actionable security value.

For this reason, we won’t be releasing jsreport hotfixes on a more frequent schedule.

We take security seriously and run multiple audit scans as part of every release, working to satisfy their requirements. This process already requires significant time and effort, and we don’t plan to extend it beyond our current scope.

Report cancelled by the client or closed network - when processing large PDF

admin — Wed, 18 Feb 2026 15:50:54 GMT

Unfortunately, there is 60s hard limit in jsreportonline
https://jsreport.net/learn/online-limits

If you want to render big reports with longer execution, you will need to switch to the onprem deployment.

Is coding background mandatory to learn DSA?

smack91 — Fri, 13 Feb 2026 10:55:01 GMT

Is coding background mandatory to learn DSA?
In the ever-changing technological world, Data Structures and Algorithms (DSA) serve as the foundation of effective programming. When you're creating applications, studying data, or tackling code-related interviews DSA abilities can open doors for great opportunities. Yet, there's a myth that persists: you require an excellent background in programming for a successful entry into DSA. Does that really hold? It's not a requirement. This blog explains how anyone, from beginners to those who are switching careers who want to learn DSA without any prior programming experience and what programs such as that of the Data Structure and Algorithm with the Full Stack Course offered in Pune help make it more simple.

What exactly are the Data Structures and Algorithms
Let's start with the fundamentals. Data structures are used to organize and store information for easy access. They are like arrays (simple lists) linked lists (flexible chains) stacks (last-in piles, first-out piles) queues (first-in lines, first-out lines) as well as tree structures (hierarchical branches) as well as graphs (networks of nodes). Algorithms, on the contrary side, are step-bystep methods to tackle problems such as sorting (bubble sort fastsort) as well as the search (binary searches).

DSA isn't just about memorizing code but rather, it's about problem-solving logical thinking. Consider it like learning chess. You do not need to be a master to learn pawn movements, or even basic strategies. Non-coders can grasp DSA concepts first, and then implement them in languages such as Python as well as Java later. This method helps to simplify the subject, and shows that it's not necessary to have coding experience.

Unmasking the Myth The Reason No Coding Background is Required
Many believe that DSA needs years of programming proficiency. Wrong! Here's the reason beginners are successful:

Conceptual The First Focus: DSA teaches thinking over syntax. Learn the reasons why a binary search cuts down the amount of data it finds (halving the time-consuming process by O(n)O(n) in O(logn)O(logn)) and programming becomes less important. Visualizers and tools (e.g., VisuAlgo) allow you to simulate without writing lines.

real-world analogies Image arrays are like grocery lists. Adding items is simple until you add them in the middle (shift everything!). No code is required to observe the inefficiency. Stacks are akin to the browser's history (back button re-opens the previous page). These models bridge the gap for newcomers.

Beginning-friendly Languages Python's simplicity shines in this. There are no braces or semicolons. Just plain code. A total newbie can grasp:

Text
stack = [] Unfilled stack stack.append(5) # Top equals stack.pop()"Pop returns five
Compare C++'s verbose syntax. Python reduces this barrier.

Stats support this with this: An 2023 Stack Overflow survey showed 40 percent of developers had no formal CS degrees. Many were self-taught using DSA platforms such as LeetCode and GeeksforGeeks.

The Path to Learning Path For Absolute Beginners
Are you ready to begin? Take a look at this roadmap that doesn't require prior knowledge:

Fundamentals of Grasp (1-2 weeks): Use free resources such as the freeCodeCamp DSA playlist, or Khan Academy. Focus on Big O notation--measuring efficiency (time/space)--without code.

Visualize and practice (2-4 weeks): Platforms like Pramp or CodeStudio provide drag-and-drop-based simulations. Learn to solve simple questions: "Reverse a string" can teach stacks with ease.

Combine and basic coding (Ongoing): Learn Python fundamentals alongside (variables loops). Codecademy's 10 hour Python course is enough.

Create Projects Create a task-oriented application that has families or queues that includes graphs. GitHub repos provide starter code.

A common mistake? Doing a jump into difficult problems. Use easy or moderate to HackerRank first.
The Challenges of Coding Without Experience (And Solutions)
There are some bumps. Syntax mistakes frustrate and confuse recursion (functions call themselves just like Russian dolls) and debugging is like a foreign experience. Solutions?

Integrative Courses Structured programs instruct DSA using the creation of code starting from scratch.

Communities Reddit's r/learnprogramming and Discord groups provide hand-holding.

An illustration is: A Pune marketing executive moved into software-based testing. Zero coding? She was able to master DSA basics in three months with online tutorials, getting an QA job.

What is the reason to learn DSA Even without Coding Plans?
DSA sharpens universal skills:

Benefit Non-Coders Coders
Problem-Solving Optimizes Excel formulas (array efficiency) Interviews are a shambles (FAANG is a fan of DSA)
Career Boost Data analytics functions are a great way to use the power of algorithmic thinking Full-stack mastery
Efficiency Automates tasks faster Scales apps
Interviews It stands out in the field of tech sales and support. Must-have for devs

In the field of data analytics (your passion? ), DSA powers efficient queries. Think hash tables to speed up searches in massive databases.

Hands-On Example: Sorting without Code
Think about bubble sorting to find the following numbers :

First Pass Compare 5>3? Swap - 5>8? No; 8>4? Swap --

Pass 2:

Visualize it, then create the code later. Complexity of time? O(n2)O(n2)--great for tiny lists, poor for big data. Quicksort is improved the speed to O(nlogn)O(nlogn). See? First, logic.

Step up with Pune's top DSA and Full Stack Programs
Pune's tech-focused hub is brimming with possibilities. To gain hands-on experience, take the Data Structure & Algorithm with Full Stack Course in Pune. They blend DSA basics with the MERN stack (MongoDB, Express, React, Node.js), HTML/CSS/JS and other projects, such as online stores. There are no coding prerequisites. The curriculum starts from zero.

Institutes such as SevenMentor offer six-month classes that include live classes, interviews and even placements. The course is expected to last 200+ hours of instruction: 40 percent DSA (arrays for dynamic programming) 60% complete stack build. The number of applicants is 80% in firms such as TCS, Infosys.

Why Pune? The proximity of Hinjewadi IT Park, vibrant gatherings, and affordable living beat Mumbai's chaotic. Find "Data Structure and Algorithm that includes a full Stack Course in Pune" for options. Many include Python/SQL, that align with your interests in analytics.

Start Today No Code, Code or Code
Background in coding? Not required for DSA. Persistence, logic and resources are sufficient. Beginning students conquer it every day by turning "impossible" to interviews that are cleared and career opportunities established. Do not believe in the myths, just dive deep.

If you're located in Pune seeking full stack courses, Data Structure and Algorithm course with Full Stack in Pune speeds up everything.
You can visit what is data structure
Social Presence
SevenMentor actively participates on Social Media channels.
• Facebook Institute uses Facebook to post announcements about courses, students' reviews and course announcements as well as live webinars online. E.g., a FB post : "Learn Python, SQL, Power BI, Tableau" &namely provided as Data Engineering/analytics & others
• Instagram The platform publishes reels with the words "New weekend Batch Alert", "training with experts-led workshops and real-world labs", "placement assistance" and more.
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