"couldn't open sender again", "failed dial attempt"

Help
1 
   $ ipfs ls /ipfs/QmSK3bexiPwd7PwhsSBTRvPpp5XUmaUkLchE8rz6vSBKsK
06:04:26.421 ERROR    bitswap: couldnt open sender again after SendMsg(<peer.ID WbFY7k>) failed: dial attempt failed: context deadline exceeded wantmanager.go:223

Ideas what might be wrong here?

That was a test file, but I’m also getting this on several other files as well:

 $ ipfs ls Qme2sLfe9ZMdiuWsEtajWMDzx6B7VbjzpSC2VWhtB6GoB1/M
06:17:26.159 ERROR    bitswap: couldnt open sender again after SendMsg(<peer.ID WXqCDU>) failed: dial attempt failed: misdial to <peer.ID WXqCDU> through /ip6/2001:470:1:572::2/tcp/4001 (got <peer.ID NbfsY8>): read tcp [2601:640:8000:4e96::6662]:4001->[2001:470:1:572::2]:4001: use of closed network connection wantmanager.go:223
06:17:26.250 ERROR    bitswap: couldnt open sender again after SendMsg(<peer.ID R7ihAg>) failed: dial attempt failed: <peer.ID ZrieeG> --> <peer.ID R7ihAg> dial attempt failed: i/o timeout wantmanager.go:223
zb2rhkt4LzL41zHBHZf4PQK2n6Ce1Pu6cyfso3enMxf8QRqvu 9   Creator
zb2rhYRY2j5HutF9jNC5voFWEZEDxzeYDPYFJf3DeFexNxc1K 8   Title
zb2rhdXu39nEJLoHLZJueoYMTyQaF3JD59gCmXmZV2VJ8gCqY 3   Language
zb2rhheaDryHwHqZPHkxu2iqDxrJC4Yibz5eZs5UqggwhNHP7 29  Description
QmbFMke1KXqnYyBBWxB74N4c5SBnJMVAiMNRcGu6x1AwQH    6   Tags
zb2rhZQUc5yaoZ36BCv1JGwcm1aVSVCBMXf9Exqu5WEL8m5Xq 5   Publisher
zb2rhkW4rJDkfZCQswCxBJjvZMMG6so5ueZwJcKWprkqEYagp 10  Date
zb2rhhDFHefkbFkgF7b7HaBk9Y2beXCaZab6jHwphRmQ8gPvK 188 Counter
zb2rhdqq9R7yGaXTFPnpHQzYmijR8XpG7vBBsGe1vttgFp27L 22  Name
ipfs@portaserver:~ $ 06:17:26.343 ERROR    bitswap: couldnt open sender again after SendMsg(<peer.ID U9KDsZ>) failed: dial attempt failed: <peer.ID ZrieeG> --> <peer.ID U9KDsZ> dial attempt failed: i/o timeout wantmanager.go:223
06:17:26.347 ERROR    bitswap: couldnt open sender again after SendMsg(<peer.ID PNCE8B>) failed: dial attempt failed: context deadline exceeded wantmanager.go:223
06:17:27.627 ERROR    bitswap: couldnt open sender again after SendMsg(<peer.ID W6vMxG>) failed: dial attempt failed: <peer.ID ZrieeG> --> <peer.ID W6vMxG> dial attempt failed: i/o timeout wantmanager.go:223
06:17:27.668 ERROR    bitswap: couldnt open sender again after SendMsg(<peer.ID PyUr6B>) failed: dial attempt failed: <peer.ID ZrieeG> --> <peer.ID PyUr6B> dial attempt failed: dial tcp4 138.197.149.142:4001: i/o timeout wantmanager.go:223
06:17:29.183 ERROR    bitswap: couldnt open sender again after SendMsg(<peer.ID awKyxD>) failed: dial attempt failed: <peer.ID ZrieeG> --> <peer.ID awKyxD> dial attempt failed: i/o timeout wantmanager.go:223
06:17:29.270 ERROR    bitswap: couldnt open sender again after SendMsg(<peer.ID NT744V>) failed: dial attempt failed: <peer.ID ZrieeG> --> <peer.ID NT744V> dial attempt failed: dial tcp4 73.193.213.79:1025: i/o timeout wantmanager.go:223
06:17:32.698 ERROR    bitswap: couldnt open sender again after SendMsg(<peer.ID PQJRgP>) failed: dial attempt failed: context deadline exceeded wantmanager.go:223
06:17:35.575 ERROR    bitswap: couldnt open sender again after SendMsg(<peer.ID YgtnbD>) failed: dial attempt failed: <peer.ID ZrieeG> --> <peer.ID YgtnbD> dial attempt failed: dial tcp4 81.187.28.14:63487: i/o timeout wantmanager.go:223
06:17:35.688 ERROR    bitswap: couldnt open sender again after SendMsg(<peer.ID QkPyDs>) failed: dial attempt failed: <peer.ID ZrieeG> --> <peer.ID QkPyDs> dial attempt failed: i/o timeout wantmanager.go:223
06:17:35.720 ERROR    bitswap: couldnt open sender again after SendMsg(<peer.ID Qy9hpK>) failed: dial attempt failed: <peer.ID ZrieeG> --> <peer.ID Qy9hpK> dial attempt failed: dial tcp4 203.156.236.194:31011: i/o timeout wantmanager.go:223
06:17:36.322 ERROR    bitswap: couldnt open sender again after SendMsg(<peer.ID cdfe96>) failed: dial attempt failed: context deadline exceeded wantmanager.go:223
06:17:36.652 ERROR    bitswap: couldnt open sender again after SendMsg(<peer.ID ds4awd>) failed: dial attempt failed: <peer.ID ZrieeG> --> <peer.ID ds4awd> dial attempt failed: i/o timeout wantmanager.go:223
06:17:36.939 ERROR    bitswap: couldnt open sender again after SendMsg(<peer.ID RDvwEg>) failed: dial attempt failed: <peer.ID ZrieeG> --> <peer.ID RDvwEg> dial attempt failed: dial tcp4 217.255.191.28:4001: getsockopt: no route to host wantmanager.go:223
06:17:37.537 ERROR    bitswap: couldnt open sender again after SendMsg(<peer.ID UhiHhK>) failed: dial attempt failed: <peer.ID ZrieeG> --> <peer.ID UhiHhK> dial attempt failed: i/o timeout wantmanager.go:223
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Update on this: I turned on --routing=dhtclient as recommended for dealing with memory problems, and it seems to have made these errors go away as a side-effect.

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