"DNS resolution failed"

23:17:02 ERROR:apache_beam.runners.worker.data_plane:Failed to read inputs in the data plane.
23:17:02 Traceback (most recent call last):
23:17:02   File "apache_beam/runners/worker/data_plane.py", line 528, in _read_inputs
23:17:02     for elements in elements_iterator:
23:17:02   File "/home/jenkins/jenkins-slave/workspace/beam_PreCommit_Python2_PVR_Flink_Phrase/src/build/gradleenv/1866363813/local/lib/python2.7/site-packages/grpc/_channel.py", line 413, in next
23:17:02     return self._next()
23:17:02   File "/home/jenkins/jenkins-slave/workspace/beam_PreCommit_Python2_PVR_Flink_Phrase/src/build/gradleenv/1866363813/local/lib/python2.7/site-packages/grpc/_channel.py", line 689, in _next
23:17:02     raise self
23:17:02 _MultiThreadedRendezvous: <_MultiThreadedRendezvous of RPC that terminated with:
23:17:02 	status = StatusCode.UNAVAILABLE
23:17:02 	details = "DNS resolution failed"
23:17:02 	debug_error_string = "{"created":"@1588108621.907750662","description":"Failed to pick subchannel","file":"src/core/ext/filters/client_channel/client_channel.cc","file_line":3981,"referenced_errors":[{"created":"@1588108621.907745000","description":"Resolver transient failure","file":"src/core/ext/filters/client_channel/resolving_lb_policy.cc","file_line":214,"referenced_errors":[{"created":"@1588108621.907743049","description":"DNS resolution failed","file":"src/core/ext/filters/client_channel/resolver/dns/c_ares/dns_resolver_ares.cc","file_line":357,"grpc_status":14,"referenced_errors":[{"created":"@1588108621.907719737","description":"C-ares status is not ARES_SUCCESS: Misformatted domain name","file":"src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper.cc","file_line":244,"referenced_errors":[{"created":"@1588108621.907691960","description":"C-ares status is not ARES_SUCCESS: Misformatted domain name","file":"src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper.cc","file_line":244}]}]}]}]}"