"Unknown, syncing headers", bitcoin core stopped synchronization #10978

issue volkno25 opened this issue on August 2, 2017
  1. volkno25 commented at 2:52 PM on August 2, 2017: none

    ###my bitcoin core say "syncing headers" and it totally stopped downloading blocks for more than 20 hours from then. this happened after 1/8 hard fork and after i set up the bitcoin ABC wallet 0.14.6, which i have removed. i tried many things and really confused now. all i want is to claim my bitcoin cash and move it to a market. please help me with this big thanks!

    Screenshots.

    untitled

    Version of bitcoin-core

    0.14.2 uasfsegwit

    Machine specs:

    • RAM: 8gb
    • Disk size:500gb
    • Disk Type (HD/SDD): hdd
  2. DonDerossi commented at 8:25 PM on August 3, 2017: none

    Same problem here, I ran Bitcoin ABC yesterday. It did share the same Blockchain Data as Bitcoin Core. I could not run both at the same time since some directory gets taken exclusively by one or the other app. Today Bitcoin Core ist stalled at 99.89% and block 479758. How do I "unblock" my BTC Blockchain? Or redownload? Thank you.

  3. sipa commented at 9:36 PM on August 3, 2017: member

    You cannot have different currencies' blockchains be stored in the same location; the result is likely corruption both directions. You can always run with -reindex to wipe the database and just process the blocks you already have again.

  4. DonDerossi commented at 11:46 PM on August 3, 2017: none

    8-O OMG ... THE man with the most commits on Core is answering... Thank you Peter! If you could just explain to a noob on how to run the -reindex command on a Mac? Do I do that while running the GUI somehow in the console? (tried verifychain...) Or do I start a Terminal, navigate to some place, launch bitcoind...? BTW. I saw a picture of you and some UASF-Supporters which lead me to believe you are now in SF. If I remember right you lived in Zurich? I live in Zurich and always wandered if you are around... Viele Dank für Dini Hilf! Don

  5. MarcoFalke commented at 6:44 AM on August 4, 2017: member

    @DonDerossi I don't have a mac, so use at your own risk: There should be an executable file at /Applications/Bitcoin-Qt.app/Contents/MacOS/Bitcoin-Qt. So just call that in the command line and append -reindex once for this call.

    /Applications/Bitcoin-Qt.app/Contents/MacOS/Bitcoin-Qt -reindex
    
  6. darkfur93 commented at 6:15 AM on August 6, 2017: none

    I also started getting this error. I have never used the ABC client.

    Update: Found this in the debug log: 2017-08-04 07:25:51 ERROR: ConnectBlock(): inputs missing/spent 2017-08-04 07:25:51 InvalidChainFound: invalid block=000000000000000000cbeb527ba00adb6bb5cb42677e0b58949e64ea92d895cc height=478967 log2_work=86.876893 date=2017-08-04 07:25:35 2017-08-04 07:25:51 InvalidChainFound: current best=00000000000000000035813dd1b5a078d8804ae0bea02fe2c94c3d769c041692 height=478966 log2_work=86.876855 date=2017-08-04 07:20:37

  7. AllanDoensen commented at 7:21 AM on August 6, 2017: contributor

    I see this on a clean VM that just runs bitcoin-ABC. It just stops downloading blocks. Killing and restarting works to continue the download but then it gets stuck again requiring a further restart. I have not seen it on a clean VM that is just running core - but I do not rule it out.

  8. DonDerossi commented at 2:04 PM on August 6, 2017: none

    SOLVED!

    Thank you very much Marco Falke! /Applications/Bitcoin-Qt.app/Contents/MacOS/Bitcoin-Qt -reindex is the exact instruction for using in the Terminal on a Mac.

    The reindexing took about 2.5 days on my 3 year old MacBook Pro Retina but now everything is back to normal.

    Thank you Core Devs! Thank you Core Maintainers! Go SegWit! And sorry for running this Bitcoin ABC garbage.

  9. fanquake closed this on Aug 9, 2017

  10. fanquake deleted a comment on Dec 14, 2017
  11. fanquake locked this on Dec 14, 2017

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