Bitcoin Core sync stuck at 2year 45 week

[AndrewCKM]

I just installed Bitcoin core 0.12.1 yesterday, and then started to sync.  However, it always stuck at 2 years 45 weeks, waiting for hours and still there.  I've tried reindex, delete the index, using the "prune" option.  But it is the same.  I'm using Windows 7 32-bit.  Thanks in advance!

[Lauda]

We would need more information in order to help you out. Are you running out of memory by any chance? Have you verified that the storage medium does not have flaws? Are you using a custom configuration (bitcoin.conf)?  
It would be very helpful if you posted the debug.log (found in your Bitcoin datadir) which should have more information in regards to the problem that you are currently having.

~Lauda

[helloeverybody]

I had this problem some time ago except i was stuck at a different time and re indexing didn't help me either. I cant quite remember what i did but i think i had to delete the whole blockchain and download it again from the start.

[cr1776]

I too would suggest this could be a memory issue. How much ram do you have? 32 bit systems with little memory can be problematic.

[AndrewCKM]

I've physical 8 GB ram.  But running on 32-bit Windows 7, it use only 4 GB of it.  The debug file is 104MB large, should I post it here?  Thx!

[Lauda]

I've physical 8 GB ram.  But running on 32-bit Windows 7, it use only 4 GB of it.  

This doesn't tell us much. You definitely have more than enough RAM to use Bitcoin Core. Without running hardware tests we can't draw to conclusions about your hardware.

The debug file is 104MB large, should I post it here?  Thx!

Please upload it to some service online (e.g. ZippyShare, Mega) and post the link here.

[AndrewCKM]

Here is the debug file:

https://drive.google.com/file/d/0B3dhh8twTq3sTnl2bldkdm1WOEE/view?usp=sharing

Thanks!

[Lauda]

Here is the debug file:
https://drive.google.com/file/d/0B3dhh8twTq3sTnl2bldkdm1WOEE/view?usp=sharing

Unfortunately, I'm unable to figure out the root cause here. There are three important events that I've noticed in this debug log:

2016-07-02 08:07:16 ERROR: ApplyTxInUndo: undo data adding output to missing transaction
2016-07-02 08:07:15 ERROR: DisconnectBlock(): added transaction mismatch? database corrupted

2016-07-02 10:39:22 nActualTimespan = 890179  before bounds
2016-07-02 10:39:22 GetNextWorkRequired RETARGET
2016-07-02 10:39:22 params.nPowTargetTimespan = 1209600    nActualTimespan = 890179
2016-07-02 10:39:22 Before: 1972dbf2  0000000000000072dbf200000000000000000000000000000000000000000000
2016-07-02 10:39:22 After:  19548732  00000000000000548732d7def344899def344899def344899def344899def344

2016-07-02 10:39:59 LoadExternalBlockFile: Deserialize or I/O error - std::bad_alloc

There's something very wrong due to the amount of errors (first and second quote). Are you sure that you have enough storage on the storage medium/partition that you're using? The last one might even suggest a hardware problem with the HDD/SSD even though this may necessarily not be the case. I had a different problem recently that suggested a hardware problem (but it wasn't one), but you can check this using software (run a full sector scan). Have you tried deleting everything (backup wallet.dat) in the datadir folder and trying from scratch (everything except the wallet.dat)?

[AndrewCKM]

Thanks for your finding!

I've over 100GB of free disk space.  I don't think there is bad sector error, but I can scan and check.

Previously, I'm installing the Bitcoin core 0.12.1 from scratch, with an empty wallet.

Anyway, I'm going to reinstall it and try again.

Feel free to drop me message if you think of anything I can do.

Thanks! ...Andrew