LogDog: Handle archive failures.

common/api/logdog_coordinator/services/v1/service.pb.go

Index: common/api/logdog_coordinator/services/v1/service.pb.go
diff --git a/common/api/logdog_coordinator/services/v1/service.pb.go b/common/api/logdog_coordinator/services/v1/service.pb.go
index 68d8dc193a9d85f547ce6c55dafc6e1c689238f6..4f7f9da353871229dad101ea2921201635dd530d 100644
--- a/common/api/logdog_coordinator/services/v1/service.pb.go
+++ b/common/api/logdog_coordinator/services/v1/service.pb.go
@@ -173,6 +173,9 @@ type ArchiveStreamRequest struct {
 	Complete bool `protobuf:"varint,2,opt,name=complete" json:"complete,omitempty"`
 	// The highest log stream index that was archived.
 	TerminalIndex int64 `protobuf:"varint,3,opt,name=terminal_index" json:"terminal_index,omitempty"`
+	// If true, there was an archival error, and the referenced streams should be
+	// considered invalid.
+	Error bool `protobuf:"varint,4,opt,name=error" json:"error,omitempty"`
 	// The archive URL of the log stream's stream data.
 	StreamUrl string `protobuf:"bytes,10,opt,name=stream_url" json:"stream_url,omitempty"`
 	// The size of the log stream's stream data.
@@ -446,38 +449,38 @@ var _Services_serviceDesc = grpc.ServiceDesc{
 }
 
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