Ethereum-wallet 0.7.4 not syncing

Hi All,

Ethereum node, golang version, has not been able to sync since some time last year. It started taking a very long time to verify blocks, apparently due to blockchain spam/attacks. On the reddit forum I found a post advising to purge the blockchain with geth --removedb and then download again with geth --fast.

This appeared to sync the entire blockchain but now, when starting up Ethereum-wallet, it says it needs to sync but is instead slowly counting backwards.

What's happening?

Here's the log file. System is OS X 10.11.6 :

bash-3.2# tail -n 300 -f node.log
I0418 21:51:03.270323 ethdb/database.go:82] Alloted 512MB cache and 1024 file handles to /Users/sub0/Library/Ethereum/chaindata
I0418 21:51:03.613678 ethdb/database.go:169] closed db:/Users/sub0/Library/Ethereum/chaindata
I0418 21:51:03.620308 ethdb/database.go:82] Alloted 512MB cache and 1024 file handles to /Users/sub0/Library/Ethereum/chaindata
I0418 21:51:03.695346 ethdb/database.go:82] Alloted 16MB cache and 16 file handles to /Users/sub0/Library/Ethereum/dapp
I0418 21:51:03.704250 eth/backend.go:170] Protocol Versions: [63 62 61], Network Id: 1
I0418 21:51:03.704485 eth/backend.go:199] Blockchain DB Version: 3
I0418 21:51:03.713750 core/blockchain.go:206] Last header: #3099808 [73041b5f…] TD=50001607559790974437
I0418 21:51:03.713792 core/blockchain.go:207] Last block: #0 [d4e56740…] TD=17179869184
I0418 21:51:03.713804 core/blockchain.go:208] Fast block: #3099963 [bb02f7b5…] TD=50003754604247219632
I0418 21:51:03.725956 p2p/server.go:311] Startrecuing Server
I0418 21:51:05.462776 p2p/discover/udp.go:217] Listening, enode://04a883e3b20d3e9bd2b0336e710440147e7a28b8bda38d483a0f2ecc1bbfa89baf9a616c01ae9467d030874eece48b6a00447da4b8e66401f383e6520b10178b@[::]:30303
I0418 21:51:05.463506 p2p/server.go:554] Listening on [::]:30303
I0418 21:51:05.471278 node/node.go:298] IPC endpoint opened: /Users/sub0/Library/Ethereum/geth.ipc
I0418 21:51:25.469773 eth/downloader/downloader.go:299] Block synchronisation started
I0418 21:51:29.588944 eth/downloader/downloader.go:1176] Rolled back 37 headers (LH: 3099808->3099808, FB: 3099963->3099962, LB: 0->0)
I0418 21:51:51.378335 eth/downloader/downloader.go:1176] Rolled back 38 headers (LH: 3099808->3099808, FB: 3099962->3099961, LB: 0->0)
I0418 21:52:17.952107 eth/downloader/downloader.go:1176] Rolled back 39 headers (LH: 3099808->3099808, FB: 3099961->3099960, LB: 0->0)
I0418 21:52:25.718012 eth/downloader/downloader.go:1176] Rolled back 40 headers (LH: 3099808->3099808, FB: 3099960->3099959, LB: 0->0)
I0418 21:52:53.081191 eth/downloader/downloader.go:1176] Rolled back 41 headers (LH: 3099808->3099808, FB: 3099959->3099958, LB: 0->0)
I0418 21:53:01.193789 eth/downloader/downloader.go:1176] Rolled back 42 headers (LH: 3099808->3099808, FB: 3099958->3099957, LB: 0->0)
I0418 21:53:07.773962 eth/downloader/downloader.go:1145] Peer 375fc4e371201312 [blocks 0.00/s, receipts 0.00/s, states 0.00/s, lacking 0]: potential rewrite attack: #3009957 [00000000…] <= #3009957 limit
I0418 21:53:53.467568 eth/downloader/downloader.go:1176] Rolled back 43 headers (LH: 3099808->3099808, FB: 3099957->3099956, LB: 0->0)
I0418 21:53:57.962975 eth/downloader/downloader.go:1145] Peer 375fc4e371201312 [blocks 0.00/s, receipts 0.00/s, states 0.00/s, lacking 0]: potential rewrite attack: #3009956 [00000000…] <= #3009956 limit
I0418 21:54:20.001624 eth/downloader/downloader.go:1176] Rolled back 44 headers (LH: 3099808->3099808, FB: 3099956->3099955, LB: 0->0)
I0418 21:54:26.552214 eth/downloader/downloader.go:1145] Peer 375fc4e371201312 [blocks 0.00/s, receipts 0.00/s, states 0.00/s, lacking 0]: potential rewrite attack: #3009955 [00000000…] <= #3009955 limit

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