I bootstrapped the juju environment for maas. It was working fine but, my bootstrapped node formatted due to network boot. I then removed juju and deleted the environments directory and reinstalled juju but not it give error as below. Please help me I'm not able to resolve the issue.

2014-09-18 12:12:11 DEBUG juju.mongo open.go:101 TLS handshake failed: x509: certificate signed by unknown authority (possibly because of "crypto/rsa: verification error" while trying to verify candidate authority certificate "juju-generated CA for environment "maas"")

2014-09-18 12:12:11 DEBUG juju.mongo open.go:101 TLS handshake failed: x509: certificate signed by unknown authority (possibly because of "crypto/rsa: verification error" while trying to verify candidate authority certificate "juju-generated CA for environment "maas"")

2014-09-18 12:12:11 DEBUG juju.mongo open.go:101 TLS handshake failed: x509: certificate signed by unknown authority (possibly because of "crypto/rsa: verification error" while trying to verify candidate authority certificate "juju-generated CA for environment "maas"")

2014-09-18 12:12:12 DEBUG juju.mongo open.go:101 TLS handshake failed: x509: certificate signed by unknown authority (possibly because of "crypto/rsa: verification error" while trying to verify candidate authority certificate "juju-generated CA for environment "maas"")

2014-09-18 12:12:13 DEBUG juju.mongo open.go:101 TLS handshake failed: x509: certificate signed by unknown authority (possibly because of "crypto/rsa: verification error" while trying to verify candidate authority certificate "juju-generated CA for environment "maas"")

2014-09-18 12:12:13 DEBUG juju.mongo open.go:101 TLS handshake failed: x509: certificate signed by unknown authority (possibly because of "crypto/rsa: verification error" while trying to verify candidate authority certificate "juju-generated CA for environment "maas"")

2014-09-18 12:12:13 DEBUG juju.mongo open.go:101 TLS handshake failed: x509: certificate signed by unknown authority (possibly because of "crypto/rsa: verification error" while trying to verify candidate authority certificate "juju-generated CA for environment "maas"")

2014-09-18 12:12:14 DEBUG juju.mongo open.go:101 TLS handshake failed: x509: certificate signed by unknown authority (possibly because of "crypto/rsa: verification error" while trying to verify candidate authority certificate "juju-generated CA for environment "maas"")

2014-09-18 12:12:15 DEBUG juju.mongo open.go:101 TLS handshake failed: x509: certificate signed by unknown authority (possibly because of "crypto/rsa: verification error" while trying to verify candidate authority certificate "juju-generated CA for environment "maas"")

2014-09-18 12:12:15 DEBUG juju.mongo open.go:101 TLS handshake failed: x509: certificate signed by unknown authority (possibly because of "crypto/rsa: verification error" while trying to verify candidate authority certificate "juju-generated CA for environment "maas"")

2014-09-18 12:12:15 DEBUG juju.mongo open.go:101 TLS handshake failed: x509: certificate signed by unknown authority (possibly because of "crypto/rsa: verification error" while trying to verify candidate authority certificate "juju-generated CA for environment "maas"")

2014-09-18 12:12:16 DEBUG juju.mongo open.go:101 TLS handshake failed: x509: certificate signed by unknown authority (possibly because of "crypto/rsa: verification error" while trying to verify candidate authority certificate "juju-generated CA for environment "maas"")

2014-09-18 12:12:16 INFO juju.worker.peergrouper initiate.go:71 finished MaybeInitiateMongoServer

2014-09-18 12:12:16 ERROR juju.cmd supercommand.go:323 cannot initiate replica set: can't dial mongo to initiate replicaset: no reachable servers

ERROR bootstrap failed: subprocess encountered error code 1

Stopping instance...

Bootstrap failed, destroying environment

ERROR subprocess encountered error code 1