add more logs to doge upstream (#773)

* add more logs to doge upstream

* fix other similar cases

src/main/kotlin/io/emeraldpay/dshackle/rpc/StreamHead.kt

@@ -44,7 +44,7 @@ class StreamHead(
             ms.getHead()
                 .getFlux()
                 .map { asProto(ms, chain, it!!) }
-                .onErrorContinue { t, _ ->
+                .onErrorContinue { t, _: Any? ->
                     log.warn("Head subscription error", t)
                 }
         }

src/main/kotlin/io/emeraldpay/dshackle/upstream/HeadLagObserver.kt

@@ -75,7 +75,7 @@ class HeadLagObserver(
             .parallel(followers.size)
             .flatMap { up -> mapLagging(top, up, getCurrentBlocks(up)).subscribeOn(lagObserverScheduler) }
             .sequential()
-            .onErrorContinue { t, _ -> log.warn("Failed to update lagging distance", t) }
+            .onErrorContinue { t, _: Any? -> log.warn("Failed to update lagging distance", t) }
     }
 
     open fun getCurrentBlocks(up: Upstream): Flux<BlockContainer> {

src/main/kotlin/io/emeraldpay/dshackle/upstream/bitcoin/BitcoinRpcHead.kt

@@ -71,8 +71,8 @@ class BitcoinRpcHead(
                     .map(extractBlock::extract)
                     .timeout(Defaults.timeout, Mono.error(Exception("Block data is not received")))
             }
-            .onErrorContinue { err, _ ->
-                log.debug("RPC error ${err.message}")
+            .onErrorContinue { err, _: Any? ->
+                log.warn("RPC error: ${err.message}")
             }
         refreshSubscription = super.follow(base)
     }

src/main/kotlin/io/emeraldpay/dshackle/upstream/grpc/GrpcUpstreams.kt

@@ -146,7 +146,7 @@ class GrpcUpstreams(
         return Flux.interval(Duration.ZERO, Duration.ofSeconds(20))
             .flatMap {
                 authAndDescribe(grpcUpstreamsAuth)
-            }.onErrorContinue { t, _ ->
+            }.onErrorContinue { t, _: Any? ->
                 if (ExceptionUtils.indexOfType(t, IOException::class.java) >= 0) {
                     log.warn("gRPC upstream $host:$port is unavailable. (${t.javaClass}: ${t.message})")
                     known.values.forEach {