No block source available/synchronising with network

[Ar3z]

Although there always are 8 active connections, my blocks suddenly stopped updating and now i always get no block source available/synchronising with network forever.
There was no change to my settings/pc.I tried googling this problem but there doesn't seem to be a solution, I tried adding nodes.
I am using bitcoin core 0.10.2.
What could cause this?

[GriffinHeart]

Update to core 0.11.0. It's just above the "MEMBERS" tab.
Give it a click and install, your wallet will still have the same amount of money and addresses, just an updated client.

[Ar3z]

Thanks, the problem is still there, No block source available

[GriffinHeart]

Thanks, the problem is still there, No block source available

Okay, there are two ways you can add nodes, the easiest is going in your core client, clicking on the "Help" tab, clicking "debug window" on the bar that shows up then click the "console" tab.
https://getaddr.bitnodes.io/nodes/?q=United%20States is a list of all active nodes.
Type into the console an active node IP address with "addnode 98.208.19.150:8333 add" (random ip I got)
Repeat this with different ips to manually add nodes to your client. One will connect and start sending you the whole blockchain.
Also, check your firewall to make sure that it isn't blocking port "8333"

Google "bitcoin conf" to manually make the config that starts when you run your core client, it isn't really needed, but it's good to have.

[Ar3z]

I excluded bitcoin qt from my firewall and added 20 nodes, still nothing.
It did update 2 weeks ago but it suddenly stopped.

[GriffinHeart]

I excluded bitcoin qt from my firewall and added 20 nodes, still nothing.
It did update 2 weeks ago but it suddenly stopped.

Huh, weird, go to the debug window then "Network Traffic"
Tell me, are you receiving any data?
Also, what operating system are you on?

[Ar3z]

I am receiving data and i"m using windows 7

[bytezero]

Thanks, the problem is still there, No block source available

Have you tried deleting all the blockchain and starting all over again?

Delete all the bitcoin folder where the blockchain is downloading, but make a copy of the file wallet.dat. This will save the wallet if you have some btcs there.

You have to do it with the wallet closed, then inside the folder bitcoin create one file named "bitcoin.conf" with this contents:

server=1
daemon=1
rpcuser=Your user
rpcpassword=Very secure password
maxconnections=90
rpcport=8335
checkblocks=2

Then start the wallet again, it should work without problems.

Make sure you have the last version (0.11.0) or bitcoinxt.

[ranochigo]

I am receiving data and i"m using windows 7

Try going to HELP>DEBUG>CONSOLE and use getpeerinfo. Ensure that your peers has a height higher than you and have a ping time. One possibility is that your database is corrupted. Open command prompt and navigate to your Bitcoin directory by keying in this

Code:

cd [Directory here]

then use this command to reindex blockchain.

Code:

bitcoin-qt.exe -reindex

.

[Ar3z]

Thanks for the replies.

Ensure that your peers has a height higher than you and have a ping time. -> this is ok
I tried reindexing 3 times, it does get further than before (46 weeks behind) but it stops updating (at 36, 30 and 10 weeks behind)
Twice i got from microsoft visual c++ runtime library "the application has requested the runtime to terminate it in an unusual way" and afterwards "error reading from database, shutting down"
 
I still have to receive coins but can't because it's not updating, so will i receive the coins if i backup my wallet and start over?

[achow101]

Have you done a hardware diagnostic? Bitcoin core is very hardware intensive and constant crashing of the software might indicate that you have bad or failing hardware.

[Ar3z]

I did another reindex and it worked, thanks guys