Error downloading http://downloads.arduino.cc/packages/package_index.json #5188

clivepengelly · 2016-07-31T11:35:30Z

I have installed a fresh copy of the IDE but continue to get this error when opening the Boards Manager.

I have followed instructions on the forum to rectify the problem but nothing works.

I am running Windows 10.

I can access this URL from my browser.

I am able to install some of the boards that are listed in the Boards Manager, but most give errors when trying to install.

Error downloading http://downloads.arduino.cc/packages/package_index.json
java.lang.RuntimeException: java.lang.Exception: Error downloading http://downloads.arduino.cc/packages/package_index.json
    at cc.arduino.contributions.packages.ui.ContributionManagerUI.lambda$onUpdatePressed$0(ContributionManagerUI.java:151)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.Exception: Error downloading http://downloads.arduino.cc/packages/package_index.json
    at cc.arduino.contributions.DownloadableContributionsDownloader.download(DownloadableContributionsDownloader.java:113)
    at cc.arduino.contributions.packages.ContributionInstaller.download(ContributionInstaller.java:330)
    at cc.arduino.contributions.packages.ContributionInstaller.downloadIndexAndSignature(ContributionInstaller.java:305)
    at cc.arduino.contributions.packages.ContributionInstaller.updateIndex(ContributionInstaller.java:283)
    at cc.arduino.contributions.packages.ui.ContributionManagerUI.lambda$onUpdatePressed$0(ContributionManagerUI.java:147)
    ... 1 more
Caused by: java.net.SocketException: Address family not supported by protocol family: connect
    at java.net.DualStackPlainSocketImpl.connect0(Native Method)
    at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:83)
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    at java.net.Socket.connect(Socket.java:589)
    at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
    at sun.net.www.http.HttpClient.openServer(HttpClient.java:432)
    at sun.net.www.http.HttpClient.openServer(HttpClient.java:527)
    at sun.net.www.http.HttpClient.<init>(HttpClient.java:211)
    at sun.net.www.http.HttpClient.New(HttpClient.java:308)
    at sun.net.www.http.HttpClient.New(HttpClient.java:326)
    at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1169)
    at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1148)
    at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:999)
    at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:933)
    at cc.arduino.utils.network.FileDownloader.downloadFile(FileDownloader.java:170)
    at cc.arduino.utils.network.FileDownloader.download(FileDownloader.java:128)
    at cc.arduino.contributions.DownloadableContributionsDownloader.download(DownloadableContributionsDownloader.java:111)
    ... 5 more

The text was updated successfully, but these errors were encountered:

agdl · 2016-08-01T15:46:24Z

Hi, If you open the preferences menu, you can navigate to the .Arduino15 folder clicking on the preferences path. Then open the folder staging/packages and try to delete all the archive you have there. Please let me know if the problem persist.

clivepengelly · 2016-08-01T15:57:38Z

Hi.

Thanks for the reply.

Deleted the folder, same problem.

agdl · 2016-08-04T10:35:32Z

Can you please give a try to this?

http://stackoverflow.com/questions/16373906/address-family-not-supported-by-protocol-family-socketexception-on-a-specific/21383865#21383865

clivepengelly · 2016-08-04T10:47:07Z

GENIUS!

This worked.

I am surprised that many more people do not have this problem. I do not have anything special in my environment.

This is what I had to do – nothing else:-

Open command prompt (windows start button, type cmd in search)
Click top left of command prompt, click properties, enable quick edit mode
Copy: setx _JAVA_OPTIONS -Djava.net.preferIPv4Stack=true
Right click on command prompt, should paste
Hit enter. That easy!

cmaglie · 2016-08-04T11:25:12Z

@clivepengelly
from the linked article it seems that the problem is caused by a spyware:

You may probably want to check if you have this program installed too.

BTW happy that you solved it!

clivepengelly · 2016-08-04T11:39:02Z

I do have this relevant knowledge thing running. What is it and where does it come from?

I download a lot of development and test software.

cmaglie · 2016-08-04T11:52:18Z

It doesn't surely come from Arduino.
Probably you installed it bundled with some other software, without noticing.

From a quick search on google:
http://www.relevantknowledge.com/faq.aspx
http://www.shouldiremoveit.com/RelevantKnowledge-12964-program.aspx

sachin1389 · 2016-08-19T10:44:51Z

Please help the problem still exist for me

I have done:

setx _JAVA_OPTIONS -Djava.net.preferIPv4Stack=true

on command prompt. I am getting "Success: specified value was saved".

I also checked for the relevant knowledge spy.

I also tried Arduino 1.6.8.

I also deleted archives in arduino15 file.

I'm still getting the error:

 Error downloading http://downloads.arduino.cc/packages/package_index.json
java.lang.RuntimeException: java.lang.Exception: Error downloading http://downloads.arduino.cc/packages/package_index.json
    at cc.arduino.contributions.packages.ui.ContributionManagerUI.lambda$onUpdatePressed$19(ContributionManagerUI.java:151)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.Exception: Error downloading http://downloads.arduino.cc/packages/package_index.json
    at cc.arduino.contributions.DownloadableContributionsDownloader.download(DownloadableContributionsDownloader.java:113)
    at cc.arduino.contributions.packages.ContributionInstaller.download(ContributionInstaller.java:330)
    at cc.arduino.contributions.packages.ContributionInstaller.downloadIndexAndSignature(ContributionInstaller.java:305)
    at cc.arduino.contributions.packages.ContributionInstaller.updateIndex(ContributionInstaller.java:283)
    at cc.arduino.contributions.packages.ui.ContributionManagerUI.lambda$onUpdatePressed$19(ContributionManagerUI.java:147)
    ... 1 more
Caused by: java.net.SocketTimeoutException: Connect timed out
    at java.net.SocksSocketImpl.readSocksReply(SocksSocketImpl.java:126)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:459)
    at java.net.Socket.connect(Socket.java:589)
    at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
    at sun.net.www.http.HttpClient.openServer(HttpClient.java:432)
    at sun.net.www.http.HttpClient.openServer(HttpClient.java:527)
    at sun.net.www.http.HttpClient.<init>(HttpClient.java:211)
    at sun.net.www.http.HttpClient.New(HttpClient.java:308)
    at sun.net.www.http.HttpClient.New(HttpClient.java:326)
    at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1169)
    at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1148)
    at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:999)
    at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:933)
    at cc.arduino.utils.network.FileDownloader.downloadFile(FileDownloader.java:170)
    at cc.arduino.utils.network.FileDownloader.download(FileDownloader.java:128)
    at cc.arduino.contributions.DownloadableContributionsDownloader.download(DownloadableContributionsDownloader.java:111)
    ... 5 more
 Error downloading http://downloads.arduino.cc/packages/package_index.json
java.lang.RuntimeException: java.lang.Exception: Error downloading http://downloads.arduino.cc/packages/package_index.json
    at cc.arduino.contributions.packages.ui.ContributionManagerUI.lambda$onUpdatePressed$19(ContributionManagerUI.java:151)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.Exception: Error downloading http://downloads.arduino.cc/packages/package_index.json
    at cc.arduino.contributions.DownloadableContributionsDownloader.download(DownloadableContributionsDownloader.java:113)
    at cc.arduino.contributions.packages.ContributionInstaller.download(ContributionInstaller.java:330)
    at cc.arduino.contributions.packages.ContributionInstaller.downloadIndexAndSignature(ContributionInstaller.java:305)
    at cc.arduino.contributions.packages.ContributionInstaller.updateIndex(ContributionInstaller.java:283)
    at cc.arduino.contributions.packages.ui.ContributionManagerUI.lambda$onUpdatePressed$19(ContributionManagerUI.java:147)
    ... 1 more
Caused by: java.net.SocketTimeoutException: Connect timed out
    at java.net.SocksSocketImpl.readSocksReply(SocksSocketImpl.java:126)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:459)
    at java.net.Socket.connect(Socket.java:589)
    at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
    at sun.net.www.http.HttpClient.openServer(HttpClient.java:432)
    at sun.net.www.http.HttpClient.openServer(HttpClient.java:527)
    at sun.net.www.http.HttpClient.<init>(HttpClient.java:211)
    at sun.net.www.http.HttpClient.New(HttpClient.java:308)
    at sun.net.www.http.HttpClient.New(HttpClient.java:326)
    at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1169)
    at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1148)
    at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:999)
    at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:933)
    at cc.arduino.utils.network.FileDownloader.downloadFile(FileDownloader.java:170)
    at cc.arduino.utils.network.FileDownloader.download(FileDownloader.java:128)
    at cc.arduino.contributions.DownloadableContributionsDownloader.download(DownloadableContributionsDownloader.java:111)
    ... 5 more
 Error downloading http://downloads.arduino.cc/packages/package_index.json
java.lang.RuntimeException: java.lang.Exception: Error downloading http://downloads.arduino.cc/packages/package_index.json
    at cc.arduino.contributions.packages.ui.ContributionManagerUI.lambda$onUpdatePressed$19(ContributionManagerUI.java:151)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.Exception: Error downloading http://downloads.arduino.cc/packages/package_index.json
    at cc.arduino.contributions.DownloadableContributionsDownloader.download(DownloadableContributionsDownloader.java:113)
    at cc.arduino.contributions.packages.ContributionInstaller.download(ContributionInstaller.java:330)
    at cc.arduino.contributions.packages.ContributionInstaller.downloadIndexAndSignature(ContributionInstaller.java:305)
    at cc.arduino.contributions.packages.ContributionInstaller.updateIndex(ContributionInstaller.java:283)
    at cc.arduino.contributions.packages.ui.ContributionManagerUI.lambda$onUpdatePressed$19(ContributionManagerUI.java:147)
    ... 1 more
Caused by: java.net.SocketTimeoutException: Connect timed out
    at java.net.SocksSocketImpl.readSocksReply(SocksSocketImpl.java:126)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:459)
    at java.net.Socket.connect(Socket.java:589)
    at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
    at sun.net.www.http.HttpClient.openServer(HttpClient.java:432)
    at sun.net.www.http.HttpClient.openServer(HttpClient.java:527)
    at sun.net.www.http.HttpClient.<init>(HttpClient.java:211)
    at sun.net.www.http.HttpClient.New(HttpClient.java:308)
    at sun.net.www.http.HttpClient.New(HttpClient.java:326)
    at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1169)
    at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1148)
    at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:999)
    at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:933)
    at cc.arduino.utils.network.FileDownloader.downloadFile(FileDownloader.java:170)
    at cc.arduino.utils.network.FileDownloader.download(FileDownloader.java:128)
    at cc.arduino.contributions.DownloadableContributionsDownloader.download(DownloadableContributionsDownloader.java:111)
    ... 5 more
 Error downloading http://downloads.arduino.cc/packages/package_index.json
java.lang.RuntimeException: java.lang.Exception: Error downloading http://downloads.arduino.cc/packages/package_index.json
    at cc.arduino.contributions.packages.ui.ContributionManagerUI.lambda$onUpdatePressed$19(ContributionManagerUI.java:151)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.Exception: Error downloading http://downloads.arduino.cc/packages/package_index.json
    at cc.arduino.contributions.DownloadableContributionsDownloader.download(DownloadableContributionsDownloader.java:113)
    at cc.arduino.contributions.packages.ContributionInstaller.download(ContributionInstaller.java:330)
    at cc.arduino.contributions.packages.ContributionInstaller.downloadIndexAndSignature(ContributionInstaller.java:305)
    at cc.arduino.contributions.packages.ContributionInstaller.updateIndex(ContributionInstaller.java:283)
    at cc.arduino.contributions.packages.ui.ContributionManagerUI.lambda$onUpdatePressed$19(ContributionManagerUI.java:147)
    ... 1 more
Caused by: java.net.SocketTimeoutException: Connect timed out
    at java.net.SocksSocketImpl.readSocksReply(SocksSocketImpl.java:126)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:459)
    at java.net.Socket.connect(Socket.java:589)
    at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
    at sun.net.www.http.HttpClient.openServer(HttpClient.java:432)
    at sun.net.www.http.HttpClient.openServer(HttpClient.java:527)
    at sun.net.www.http.HttpClient.<init>(HttpClient.java:211)
    at sun.net.www.http.HttpClient.New(HttpClient.java:308)
    at sun.net.www.http.HttpClient.New(HttpClient.java:326)
    at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1169)
    at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1148)
    at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:999)
    at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:933)
    at cc.arduino.utils.network.FileDownloader.downloadFile(FileDownloader.java:170)
    at cc.arduino.utils.network.FileDownloader.download(FileDownloader.java:128)
    at cc.arduino.contributions.DownloadableContributionsDownloader.download(DownloadableContributionsDownloader.java:111)
    ... 5 more

sachin1389 · 2016-08-19T12:01:39Z

Hey Problem solved,I just tried remove as much software which was seeing to be unknown to me
and then deleted the arduino and reinstalled and then restarted my pc . now it is working fine.

adam4142 · 2016-11-05T05:02:05Z

Its worked ...........
you r a GENIUS>............

ArimoJak7 · 2017-01-25T11:07:21Z

thanks
it worked

paulenuta · 2017-02-04T03:17:38Z

I had same error, but could not even manually open the http://downloads.arduino.cc/packages/package_index.json list.
I solve the problem be restarting PPOE connection to the ISP on the internet Router.

TechnocratLabs · 2017-03-25T03:20:10Z

it's a problem of Internet connectivity in PC or laptop.

bigelite · 2017-06-03T09:27:18Z

i have this problem too,
I have followed instructions on the forum to rectify the problem but nothing works.
I am running Windows 10.
I can access this URL from my browser.
I've opened the folder staging/packages and deleted all the archive that i had.
I've tried this one: setx _JAVA_OPTIONS -Djava.net.preferIPv4Stack=true

but its still had an error. i don't know what to do!

ShotgunBurger · 2017-06-19T07:19:27Z

I had this issue - I am running Windows 10, Arduino IDE 1.8.3
I tried the CMD Prompt "setx _JAVA_OPTIONS -Djava.net.preferIPv4Stack=true"
I tried a fresh install of the Arduino IDE
I tried resetting my PPPoE Connection via my modem to my ISP
I tried using WiFi, Ethernet and tethering to my cell phone's ISP via personal hotspot
None of these fixed the problem.

I fixed my issue by going to "ThisPC>(C:)>Users>xxxx>AppData>Local>Arduino15" and deleting the file "package_index.json.tmp"

Now it works fine.

mrohner · 2017-06-28T10:14:41Z

This setx _JAVA_OPTIONS -Djava.net.preferIPv4Stack=true
results in an error:
ERROR: Invalid syntax. Default option is not allowed more than '2' time(s).
Type "SETX /?" for usage.

jeanmoretto · 2017-07-01T02:35:05Z

@ShotgunBurger perfect for me. I just deleted that file and "voilà".
It back to work.

hamid1234567 · 2017-07-14T21:41:47Z

I could solved this issue by correcting java configuration and change the proxy seeting of java network to correct solution. try these step in windows
1- search configure java from start menu
2- In general tab open network setting and correct it (i changed it to direct connection - no proxy )
arduino work and download rapidly any things

friesandacoke · 2017-07-30T19:59:06Z

@ShotgunBurger That was what I needed. Perfect. Thanks!

To add, most will need to unhide hidden files and folders before they can see the appdata folders.

sunnydevtale · 2017-09-18T10:14:40Z

Hi,

I am also facing the same error while managing the Arduino libraries. I have tried all above solution but this didn't worked for me.

For me, getting this error due to internet connectivity. I have switch to another internet network and tried again and this Works..!.

Hopefully this issue will resolve for you also.

MrJ6 · 2017-10-10T09:22:06Z

@ShotgunBurger , thanks man you are a life saver ^^

sunnydevtale · 2017-10-10T14:50:10Z

:) YW..!

AlexSwensen · 2017-10-22T21:26:57Z

I think it might be down today. Tried to access the URL from my phone and home connection. No dice.

AlexSwensen · 2017-10-22T21:54:11Z

And its back.

tin345 · 2017-11-18T12:32:17Z

This one worked for me also.... Thanks Much...

SYEDMAQSOOD05 · 2018-02-27T06:22:27Z

Error downloading https://github.com/esp8266/Arduino/releases/download/2.3.0/win32-xtensa-lx106-elf-gb404fb9-2.tar.gz
java.lang.RuntimeException: java.lang.Exception: Error downloading https://github.com/esp8266/Arduino/releases/download/2.3.0/win32-xtensa-lx106-elf-gb404fb9-2.tar.gz
	at cc.arduino.contributions.packages.ui.ContributionManagerUI.lambda$onInstallPressed$1(ContributionManagerUI.java:176)
	at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.Exception: Error downloading https://github.com/esp8266/Arduino/releases/download/2.3.0/win32-xtensa-lx106-elf-gb404fb9-2.tar.gz
	at cc.arduino.contributions.DownloadableContributionsDownloader.download(DownloadableContributionsDownloader.java:131)
	at cc.arduino.contributions.DownloadableContributionsDownloader.download(DownloadableContributionsDownloader.java:69)
	at cc.arduino.contributions.packages.ContributionInstaller.install(ContributionInstaller.java:110)
	at cc.arduino.contributions.packages.ui.ContributionManagerUI.lambda$onInstallPressed$1(ContributionManagerUI.java:173)
	... 1 more
Caused by: java.net.SocketException: Connection reset
	at java.net.SocketInputStream.read(SocketInputStream.java:210)
	at java.net.SocketInputStream.read(SocketInputStream.java:141)
	at sun.security.ssl.InputRecord.readFully(InputRecord.java:465)
	at sun.security.ssl.InputRecord.readV3Record(InputRecord.java:593)
	at sun.security.ssl.InputRecord.read(InputRecord.java:532)
	at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:983)
	at sun.security.ssl.SSLSocketImpl.readDataRecord(SSLSocketImpl.java:940)
	at sun.security.ssl.AppInputStream.read(AppInputStream.java:105)
	at java.io.BufferedInputStream.read1(BufferedInputStream.java:284)
	at java.io.BufferedInputStream.read(BufferedInputStream.java:345)
	at sun.net.www.MeteredStream.read(MeteredStream.java:134)
	at java.io.FilterInputStream.read(FilterInputStream.java:133)
	at sun.net.www.protocol.http.HttpURLConnection$HttpInputStream.read(HttpURLConnection.java:3375)
	at sun.net.www.protocol.http.HttpURLConnection$HttpInputStream.read(HttpURLConnection.java:3368)
	at cc.arduino.utils.network.FileDownloader.downloadFile(FileDownloader.java:209)
	at cc.arduino.utils.network.FileDownloader.download(FileDownloader.java:128)
	at cc.arduino.contributions.DownloadableContributionsDownloader.download(DownloadableContributionsDownloader.java:129)
	... 4 more

yokozawa766 · 2018-09-27T11:02:21Z

Just copy company's proxy setting to ArduinoIDE>preference>NetworkTab. It works. You can use library manager and board manager.

maurodom · 2018-10-08T09:59:17Z

I tried every fix here with no results.
Afterward I momentarely disabled my TinyWall firewall and then the "Error downloading http://downloads.arduino.cc/packages/package_index.json" disappeared.
All the boards I needed have been immediately downloaded.
Hope it helps.

yokozawa766 · 2018-10-08T10:17:50Z

MR. maurodom,
I write the way to the picture ;
http://yokozawa766.car.coocan.jp/proxy.jpg

zexalistic · 2018-10-23T20:54:49Z

Thank you very much!!!

cooldew2007 · 2018-11-05T09:50:41Z

This worked for me. Cheers

DarkStar18 · 2018-11-18T02:00:29Z

@clivepengelly Wow, open the Command and paste "setx _JAVA_OPTIONS -Djava.net.preferIPv4Stack=true" WORK perfectly. Thank you so much for solving my problem. <3

xuanbka1 · 2019-03-06T03:39:23Z

thanks !! so lady

AnnaLobo · 2019-03-26T13:39:09Z

thaaaaanks the only thing that worked \o/

amrithmmh · 2019-04-30T05:43:53Z

this worked for me

NeMeSiS97 · 2019-05-10T07:17:06Z

This is indeed the correct solution.
Thanks alot mate

iofirag · 2019-06-24T13:02:04Z

open arduino ide
File > Preferences

copy paste to the input box of (Additional boards manager urls):
https://arduino.esp8266.com/stable/package_esp8266com_index.json

click on arduino folder url link at the bottom. and leave it aside.

click ok in preferences screen.

open cmd and copy paste this:
"setx _JAVA_OPTIONS -Djava.net.preferIPv4Stack=true"

open ide again, and wait a minute.
looking on the content folder from before, when something has changed,
wait some seconds to finish,
and then,
delete all from the folder except from the preferences.txt

open:
Tools > Board > Board Manager

see if the loader in the bottom finish working

smtpsantiago · 2019-07-24T19:34:02Z

They recommend deleting the file package_index.json that is stored in package_index.json or package_index.json.tmp

JeffrySan · 2019-09-05T07:51:29Z

I had this issue - I am running Windows 10, Arduino IDE 1.8.3
I tried the CMD Prompt "setx _JAVA_OPTIONS -Djava.net.preferIPv4Stack=true"
I tried a fresh install of the Arduino IDE
I tried resetting my PPPoE Connection via my modem to my ISP
I tried using WiFi, Ethernet and tethering to my cell phone's ISP via personal hotspot
I tried by going to "ThisPC>(C:)>Users>xxxx>AppData>Local>Arduino15" and delete all of them and nothing happend
None of these fixed the problem.

but when i try to uninstall java and reinstall it and plus to configure java path on Advance System Settings, it's good (in condition i reinstall arduino, i delete file in arduino>file>preferences folder)

Goodluck guyss

pvinod424 · 2019-09-13T17:20:26Z

It worked for me!! Try this definately
I fixed my issue by going to "ThisPC>(C:)>Users>xxxx>AppData>Local>Arduino15" and deleting the file "package_index.json.tmp"

Ksol13 · 2019-10-09T11:12:43Z

I have the same problem.
But if i try to delete "package_index.json.tmp", a new file comes up again and again.
Whats my mistake?

JeffrySan · 2019-10-11T07:12:38Z

Re Install your Java from computer : 1. Uninstall java from (add remove program (search)) 2. Install Java from https://www.java.com/en/download/

…

On Wed, Oct 9, 2019 at 6:13 PM Ksol13 ***@***.***> wrote: I have the same problem. But if i try to delete "package_index.json.tmp", a new file comes up again and again. Whats my mistake? — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#5188?email_source=notifications&email_token=ANDDKZKHDJTW5BMYAHEAL5TQNW4F3A5CNFSM4CLEBVB2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOEAXRACY#issuecomment-539955211>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ANDDKZMX7HBWYN5E4RB3NZTQNW4F3ANCNFSM4CLEBVBQ> .

MiracelVip · 2020-01-03T18:25:46Z

I have the same problem here... my computer is connected to an IPv6 DSLITE internet. I cant open the "https://downloads.arduino.cc/libraries/library_index.json.sig" it says "not found" the only posibility was to open a hotspot with my mobile and download the file

It seems like a ipv4 ipv6 problem

yihanglim · 2020-06-09T17:40:26Z

Same here, tried all method stated above, the file just keep comes up again when try to open board manager. Are you able to solve it yet?

ptrooms · 2020-06-09T18:28:32Z

@yihanglim I've perhaps a related problem.
When I try to use Board_Manager, I run into an java.lang.RuntimeException:

java.lang.NullPointerException
java.lang.RuntimeException: java.lang.NullPointerException
        at cc.arduino.contributions.packages.ui.ContributionManagerUI.lambda$onUpdatePressed$1(ContributionManagerUI.java:150)
        at java.lang.Thread.run(Thread.java:748)

Note: this BM action updates file(s) from "http://downloads.arduino.cc/packages/package_index.json"
After this, BM exception, Arduino cannot be restarted as long the "package_index.json" exists.
Removing this re-iterates the problem as soon as I (need to) update board manager.

Note: I run Linux, the problem initiated on my old Arduino 1.8.5 (which was fine) and now persists with the latest 1.8.12. The same happens on a cleanly installed machine. Hence, something seems to be wrong with "package_index.json".

KTibow · 2020-06-09T18:33:27Z

You could try deleting all files that seem related to package_index.json, not just package_index.json.tmp.

ptrooms · 2020-06-09T18:35:23Z

@KTibow : same result. Clearing the .Arduino15 directory will refill it with newly downloaded files as soon when I try to use BoardManager.

Further testing, show that (my problem) is related to the signature file "package_index.json.sig", as soon as I remove that file and/or change the original contents of "package_index.json" (which causes an unmatched signature), I can restart Arduino with the per BoardManager newly updated json file.
Problem remains of course that whenever I try to use BoardManager, this file is renewed and again re-iterate the start of the problem (java null-exception at/with BoardManager).

I also compared "package_index.json" with te preserved old one (dated january 2020) and found that new file now of contains the following extra packages: arduino-beta, Arduino megaAVR Boards 1.8.6 (in addition tot 1.8.5), Arduino nRF528x Boards (Mbed OS), avr-gcc 7.3.0-atmel3.6.1-arduino7 (in addition to 7.3.0-atmel3.6.1-arduino5.

I see #10333 reporting this (exception) and continue to contribute there.

yihanglim · 2020-06-10T04:38:35Z

@ptrooms after spending whole night of troubleshooting, I couldn't find a solution. This version used to work fine for a few days before and suddenly this issue occurred out of nothing. So I uninstalled 1.8.12 and installed the hourly builds (last upated 3 June 2020 22:13:17 GMT) . So far everything runs alright.

ptrooms · 2020-06-10T05:50:31Z

@yihanglim , yes metoo. Currently I'm using the nightly version also. See the other threads for more details. Time for a good nap of sleep.

facchinm · 2020-06-10T08:27:13Z

We had a problem on our package_index.json that caused the error and prevented the IDE to start.
Now the package_index has been fixed, but to recover a working installation you must delete once again the package_index.json with the cache folder and restart the IDE as usual.

Windows:

remove file C:\Users\YourUsername\AppData\Local\Arduino15\package_index.json
remove folder C:\Users\YourUsername\AppData\Local\Arduino15\cache

Mac:

remove file /Users/YourUsername/Library/Arduino15/package_index.json
remove folder /Users/YourUsername/Library/Arduino15/cache

Linux:

remove file /home/YourUsername/.arduino15/package_index.json
remove folder /home/YourUsername/.arduino15/cache

Please note that the problem that prevents the IDE to start has already been fixed and it's ready for the next release, that's the reason why the Nightly/Beta Builds are not affected, and also the reason why we did not detect this problem earlier, sorry about that!

dharmik768 · 2021-05-05T14:04:21Z

Tried everything and at last, @ShotgunBurger fixed my bug thanks man.

dammyjay · 2021-09-16T15:38:58Z

so reliefed

bunya017 · 2022-07-15T07:47:25Z

If everything here doesn't work for you, download the package manually and place it in C:\Users\< USER >\AppData\Local\Arduino15\staging\packages. Then go back to the IDE and install again.

behnamsaberi · 2023-01-26T15:12:36Z

hi , it worked for me too
thanksssss

agdl added the Waiting for feedback More information must be provided before we can proceed label Aug 1, 2016

cmaglie closed this as completed Aug 4, 2016

cmaglie removed the Waiting for feedback More information must be provided before we can proceed label Oct 18, 2016

per1234 added the Component: Board/Lib Manager Boards Manager or Library Manager label Feb 11, 2018

per1234 added the Type: Bug label Nov 26, 2019

arduino locked as resolved and limited conversation to collaborators Jan 26, 2023

Error downloading http://downloads.arduino.cc/packages/package_index.json #5188

Error downloading http://downloads.arduino.cc/packages/package_index.json #5188

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