diff --git a/internal/pkg/service/common/etcdop/watch.go b/internal/pkg/service/common/etcdop/watch.go
index f693a3233c..e077ab66e0 100644
--- a/internal/pkg/service/common/etcdop/watch.go
+++ b/internal/pkg/service/common/etcdop/watch.go
@@ -2,7 +2,6 @@ package etcdop
 
 import (
 	"context"
-	"fmt"
 	"time"
 
 	"go.etcd.io/etcd/api/v3/mvccpb"
@@ -158,7 +157,6 @@ func (v Prefix) WatchWithoutRestart(ctx context.Context, client etcd.Watcher, op
 		// The rawCh channel is closed by the context, so the context does not have to be checked here again.
 		rawCh := client.Watch(ctx, v.Prefix(), append([]etcd.OpOption{etcd.WithPrefix(), etcd.WithCreatedNotify()}, opts...)...)
 		for rawResp := range rawCh {
-			fmt.Println("rawResp from WatchWithoutRestart", rawResp.Header.Revision)
 			header := rawResp.Header
 			resp := WatchResponseRaw{}
 			resp.Header = &header
@@ -197,7 +195,6 @@ func (v Prefix) WatchWithoutRestart(ctx context.Context, client etcd.Watcher, op
 
 			// Map event type
 			for _, rawEvent := range rawResp.Events {
-				fmt.Println("rawEvent from WatchWithoutRestart", string(rawEvent.Kv.Key), rawEvent.Type)
 				var typ EventType
 				switch {
 				case rawEvent.IsCreate():
diff --git a/internal/pkg/service/common/etcdop/watch_mirror_map.go b/internal/pkg/service/common/etcdop/watch_mirror_map.go
index 7c71c82be2..3c5b819c72 100644
--- a/internal/pkg/service/common/etcdop/watch_mirror_map.go
+++ b/internal/pkg/service/common/etcdop/watch_mirror_map.go
@@ -2,7 +2,6 @@ package etcdop
 
 import (
 	"context"
-	"fmt"
 	"maps"
 	"sync"
 
@@ -89,7 +88,6 @@ func (m *MirrorMap[T, K, V]) StartMirroring(ctx context.Context, wg *sync.WaitGr
 
 			// Atomically process all events
 			for _, event := range events {
-				fmt.Println("event from StartMirroring", event.Key, event.Type)
 				if m.filter != nil && !m.filter(event) {
 					continue
 				}
@@ -152,7 +150,6 @@ func (m *MirrorMap[T, K, V]) StartMirroring(ctx context.Context, wg *sync.WaitGr
 			m.updated = make(chan struct{})
 			m.updatedLock.Unlock()
 
-			fmt.Println("calling callbacks from mirror map", update, "restart", restart)
 			// Call callbacks
 			for _, fn := range m.onUpdate {
 				go fn(update)
diff --git a/internal/pkg/service/stream/sink/router/pipeline.go b/internal/pkg/service/stream/sink/router/pipeline.go
index 6a71023e6b..f3da489992 100644
--- a/internal/pkg/service/stream/sink/router/pipeline.go
+++ b/internal/pkg/service/stream/sink/router/pipeline.go
@@ -65,6 +65,7 @@ func (r *pipelineRef) ensureOpened(c recordctx.Context) error {
 	}
 
 	// Try open, if needed, and there is no retry backoff delay active
+
 	r.lock.Lock()
 	defer r.lock.Unlock()
 
diff --git a/internal/pkg/service/stream/storage/level/local/diskwriter/network/router/pipeline/pipeline_sink.go b/internal/pkg/service/stream/storage/level/local/diskwriter/network/router/pipeline/pipeline_sink.go
index ed413e8c22..341a6c0f20 100644
--- a/internal/pkg/service/stream/storage/level/local/diskwriter/network/router/pipeline/pipeline_sink.go
+++ b/internal/pkg/service/stream/storage/level/local/diskwriter/network/router/pipeline/pipeline_sink.go
@@ -93,9 +93,14 @@ func (p *SinkPipeline) ReopenOnSinkModification() bool {
 }
 
 func (p *SinkPipeline) WriteRecord(c recordctx.Context) (pipelinePkg.WriteResult, error) {
+
+	// Make a local copy of pipelines while holding the read lock
 	p.writeLock.RLock()
-	defer p.writeLock.RUnlock()
-	return p.balancer.WriteRecord(c, p.pipelines)
+	pipelines := make([]balancer.SlicePipeline, len(p.pipelines))
+	copy(pipelines, p.pipelines)
+	p.writeLock.RUnlock()
+
+	return p.balancer.WriteRecord(c, pipelines)
 }
 
 // UpdateSlicePipelines reacts on slices changes - closes old pipelines and open new pipelines.
diff --git a/internal/pkg/service/stream/storage/level/local/diskwriter/network/router/pipeline/pipeline_slice.go b/internal/pkg/service/stream/storage/level/local/diskwriter/network/router/pipeline/pipeline_slice.go
index 7e7effe95d..62f41d0689 100644
--- a/internal/pkg/service/stream/storage/level/local/diskwriter/network/router/pipeline/pipeline_slice.go
+++ b/internal/pkg/service/stream/storage/level/local/diskwriter/network/router/pipeline/pipeline_slice.go
@@ -50,7 +50,16 @@ type SliceData struct {
 	LocalStorage localModel.Slice
 }
 
-func NewSlicePipeline(ctx context.Context, logger log.Logger, telemetry telemetry.Telemetry, connections *connection.Manager, encoding *encoding.Manager, ready *readyNotifier, slice *SliceData, onClose func(ctx context.Context, cause string)) *SlicePipeline {
+func NewSlicePipeline(
+	ctx context.Context,
+	logger log.Logger,
+	telemetry telemetry.Telemetry,
+	connections *connection.Manager,
+	encoding *encoding.Manager,
+	ready *readyNotifier,
+	slice *SliceData,
+	onClose func(ctx context.Context, cause string),
+) *SlicePipeline {
 	p := &SlicePipeline{
 		logger:      logger.With(slice.SliceKey.Telemetry()...),
 		telemetry:   telemetry,
diff --git a/internal/pkg/service/stream/storage/level/local/diskwriter/network/router/router.go b/internal/pkg/service/stream/storage/level/local/diskwriter/network/router/router.go
index 80cb4b38b9..b54ecaf53b 100644
--- a/internal/pkg/service/stream/storage/level/local/diskwriter/network/router/router.go
+++ b/internal/pkg/service/stream/storage/level/local/diskwriter/network/router/router.go
@@ -192,7 +192,8 @@ func (r *Router) onSlicesModification(ctx context.Context, modifiedSinks []key.S
 			wg.Add(1)
 			go func() {
 				defer wg.Done()
-				if err := p.UpdateSlicePipelines(ctx, r.assignSinkSlices(sinkKey)); err != nil {
+				slices := r.assignSinkSlices(sinkKey)
+				if err := p.UpdateSlicePipelines(ctx, slices); err != nil {
 					r.logger.Errorf(ctx, `cannot update sink slices pipelines: %s, sink %q`, err, sinkKey)
 				}
 			}()
diff --git a/internal/pkg/service/stream/storage/level/local/diskwriter/network/rpc/client.go b/internal/pkg/service/stream/storage/level/local/diskwriter/network/rpc/client.go
index c37acf00ed..ce4d9b65a0 100644
--- a/internal/pkg/service/stream/storage/level/local/diskwriter/network/rpc/client.go
+++ b/internal/pkg/service/stream/storage/level/local/diskwriter/network/rpc/client.go
@@ -151,13 +151,15 @@ func OpenNetworkFile(
 		ctx := context.Background()
 		// It is expected to receive only one message, `io.EOF` or `message` that the termination is done
 		if _, err := termStream.Recv(); err != nil {
-			if errors.Is(err, io.EOF) {
+			fmt.Println("err", err, "unwrap", errors.Unwrap(err))
+			if strings.HasSuffix(err.Error(), io.EOF.Error()) {
 				onServerTermination(ctx, "remote server shutdown")
 				return
 			}
 
 			if s, ok := status.FromError(err); !ok || s.Code() != codes.Canceled {
-				if s.Code() == codes.Unavailable && errors.Is(s.Err(), io.EOF) {
+				fmt.Println("err", s.Err(), "unwrap", errors.Unwrap(s.Err()))
+				if s.Code() == codes.Unavailable && strings.HasSuffix(s.Err().Error(), io.EOF.Error()) {
 					onServerTermination(ctx, "remote server shutdown")
 					return
 				}
diff --git a/internal/pkg/service/stream/storage/level/local/encoding/manager.go b/internal/pkg/service/stream/storage/level/local/encoding/manager.go
index cb9e067326..c95406e2fc 100644
--- a/internal/pkg/service/stream/storage/level/local/encoding/manager.go
+++ b/internal/pkg/service/stream/storage/level/local/encoding/manager.go
@@ -114,6 +114,7 @@ func (m *Manager) OpenPipeline(
 		closeFunc,
 	)
 	if err != nil {
+		m.removePipeline(sliceKey)
 		return nil, err
 	}