JSreport sometime generate an error font

[Ngô Duy]

Hello. Sometime we receive an error font PDF.
Almost character become "A"

What's my problem ? How to fix that ? Or where it come from ? PLs suggest me and i will check

[jan_blaha]

are you able to replicate the problem in the playground?

[Ngô Duy]

No. I can't. I dont know how to reproduce that to fix.

I only know that it's not frequently happen. Randomly.

[Ngô Duy]

It look like only happen on "accented letters". And another interesting thing is that it just happens randomly. As you can see in the picture, there are places that are faulty, there are places that are not

I exact font in file PDF and got below

[Ngô Duy]

My config in a 8 core, 8 Gb Ram machine. Pls review and suggest if i doing something wrong. I using version 2.10.0.

{
    "httpPort": 5488,
    "reportTimeout": 600000,
	"enableRequestReportTimeout":true,
    "logger": {
        "console": {
            "transport": "console",
            "level": "error"
        },
        "file": {
            "transport": "file",
            "level": "info",
            "filename": "logs/reporter.log"
        },
        "error": {
            "transport": "file",
            "level": "error",
            "filename": "logs/error.log"
        }
    },
    "allowLocalFilesAccess": true,
    "store": {
        "provider": "memory"
    },
    "blobStorage": {
        "provider": "memory"
    },
    "trustUserCode": false,
    "templatingEngines": {
        "numberOfWorkers": 8,
        "strategy": "in-process"
    },
    "chrome": {
        "launchOptions": {
            "args": [
                "--no-sandbox",
				"--disable-setuid-sandbox"
            ]
        }
    },
    "workers": {
        "numberOfWorkers": 2
    },
    "extensions": {
        "authentication": {
            "cookieSession": {
                "secret": "place_holder_password@cenTos",
                "cookie": {
                    "secure": true
                }
            },
            "admin": {
                "username": "place_holder_admin",
                "password": "place_holder_password"
            },
			"authorizationServer": {"tokenValidation": {"endpoint": "http://place_holder_url:3000/api/jsreport","auth": false}},
            "enabled": true
        },
        "chrome-pdf": {
            "timeout": 600000,
            "strategy": "chrome-pool",
            "numberOfWorkers": 8
        }
    }
}

I only got this error on pm2 log:

2022-09-13T00:00:49: pdf utils failed to remove the hidden marks from pdf, this has no significant impact, but please report the issue. Error: incorrect header check
    at Zlib.zlibOnError [as onerror] (node:zlib:189:17)
    at processChunkSync (node:zlib:457:12)
    at zlibBufferSync (node:zlib:178:12)
    at Object.syncBufferWrapper [as unzipSync] (node:zlib:792:14)
    at processStream (/jsreportapp/node_modules/jsreport-pdf-utils/lib/utils/processText.js:50:22)
    at processStream (/jsreportapp/node_modules/jsreport-pdf-utils/lib/utils/processText.js:74:13)
    at runMicrotasks (<anonymous>)
    at processTicksAndRejections (node:internal/process/task_queues:96:5)
    at async processStream (/jsreportapp/node_modules/jsreport-pdf-utils/lib/utils/processText.js:74:7)
    at async module.exports (/jsreportapp/node_modules/jsreport-pdf-utils/lib/utils/processText.js:215:7)
    at async Object.postprocess (/jsreportapp/node_modules/jsreport-pdf-utils/lib/utils/pdfManipulator.js:104:7)
    at async module.exports (/jsreportapp/node_modules/jsreport-pdf-utils/lib/scriptPdfProcessing.js:83:5)
    at async scriptExecModuleWrapper (/jsreportapp/node_modules/jsreport-core/lib/scriptExecModuleWrapper.js:34:20) {
  errno: -3,
  code: 'Z_DATA_ERROR'
}

ecosystem.config.js

module.exports = {
  apps: [{
    name: "jsreport-server",
    script: "./server.js",
    instances: 1,
    exec_mode  : "cluster",
    autorestart: true,
    time: true,
    node_args: "--max_old_space_size=1024",
    max_memory_restart:"1024M"
  }]
}

my server.js running by pm2

const jsreport = require('jsreport')()

if (process.env.JSREPORT_CLI) {
  // export jsreport instance to make it possible to use jsreport-cli
  module.exports = jsreport
} else {
  jsreport.init().then(() => {
    // running
  }).catch((e) => {
    // error during startup
    console.error(e.stack)
    process.exit(1)
  })
}

[jan_blaha]

So if you put that letter to the playground with particular font applied, it works fine?

[Ngô Duy]

Right. It usually shows up right on my computer. But sometimes it shows wrong.

[jan_blaha]

Could you share the link to playground with a single letter anyway?
I would try it on my local...

[Ngô Duy]

@jan_blaha

Hello, i found that character convert wrong. I convert from HTML UTF-8

&nbsp become Â

[Ngô Duy]

any idea ?

[jan_blaha]

The thing is that jsreport doesn't deal with fonts or pdf printing. Both are done by chrome which we have no influence on. So unfortunately I have no clue.

If you are able to print a pdf with a single letter that is wrong like you mention and email it to me. I could take a look inside if I find out something.