diff --git a/lib/kinesis_client/stream.ex b/lib/kinesis_client/stream.ex
index 17618af..2566ec4 100644
--- a/lib/kinesis_client/stream.ex
+++ b/lib/kinesis_client/stream.ex
@@ -71,7 +71,7 @@ defmodule KinesisClient.Stream do
     ]
 
     Logger.debug(
-      "Starting KinesisClient.Stream: [app_name: #{app_name}, stream_name: {stream_name}]"
+      "Starting KinesisClient.Stream: [app_name: #{app_name}, stream_name: #{stream_name}]"
     )
 
     Supervisor.init(children, strategy: :one_for_all)
diff --git a/lib/kinesis_client/stream/app_state.ex b/lib/kinesis_client/stream/app_state.ex
index 44cfea4..118bc98 100644
--- a/lib/kinesis_client/stream/app_state.ex
+++ b/lib/kinesis_client/stream/app_state.ex
@@ -11,8 +11,13 @@ defmodule KinesisClient.Stream.AppState do
   Get a `KinesisClient.Stream.AppState.ShardInfo` struct by shard_id. If there is not an existing
   record, returns `:not_found`.
   """
-  def get_lease(app_name, stream_name, shard_id, opts \\ []),
-    do: adapter(opts).get_lease(app_name, stream_name, shard_id, opts)
+  def get_lease(app_name, stream_name, shard_id, opts \\ []) do
+    IO.inspect("app get_lease called")
+    IO.inspect("app_name: #{app_name}, stream_name: #{stream_name}, shard_id: #{shard_id}")
+    IO.puts("opts: #{inspect(opts)}")
+    IO.puts("adapter: #{inspect(adapter(opts))}")
+    adapter(opts).get_lease(app_name, stream_name, shard_id, opts)
+  end
 
   @doc """
   Persists a new ShardInfo record. Returns an error if there is already a record for that `shard_id`
diff --git a/lib/kinesis_client/stream/app_state/adapter.ex b/lib/kinesis_client/stream/app_state/adapter.ex
index bf71c7c..e8d12fd 100644
--- a/lib/kinesis_client/stream/app_state/adapter.ex
+++ b/lib/kinesis_client/stream/app_state/adapter.ex
@@ -63,4 +63,10 @@ defmodule KinesisClient.Stream.AppState.Adapter do
               opts :: keyword
             ) ::
               :ok | {:error, any}
+
+  @callback delete_all_leases_and_restart_workers(
+              supervisor :: Supervisor.t(),
+              app_name :: String.t(),
+              opts :: keyword
+            ) :: {:ok, any} | {:error, any}
 end
diff --git a/lib/kinesis_client/stream/app_state/dynamo.ex b/lib/kinesis_client/stream/app_state/dynamo.ex
index bca698f..b929770 100644
--- a/lib/kinesis_client/stream/app_state/dynamo.ex
+++ b/lib/kinesis_client/stream/app_state/dynamo.ex
@@ -16,6 +16,35 @@ defmodule KinesisClient.Stream.AppState.Dynamo do
     end
   end
 
+  @impl true
+  def delete_all_leases_and_restart_workers(supervisor, app_name, _opts) do
+    case app_name
+         |> Dynamo.scan()
+         |> ExAws.request() do
+      {:ok, items} ->
+        Enum.each(items["Items"], fn lease ->
+          cond do
+            lease["shard_id"] ->
+              app_name
+              |> Dynamo.delete_item(%{"shard_id" => lease["shard_id"]["S"]})
+              |> ExAws.request()
+          end
+        end)
+
+        case Process.whereis(supervisor) do
+          nil ->
+            {:error, "Supervisor not running"}
+
+          pid ->
+            Process.exit(pid, :shutdown)
+            {:ok, "Shard leases deleted and workers restarted"}
+        end
+
+      {:error, error} ->
+        {:error, error}
+    end
+  end
+
   defp create_table(app_name) do
     app_name
     |> send_create_table_request()
diff --git a/lib/kinesis_client/stream/app_state/ecto.ex b/lib/kinesis_client/stream/app_state/ecto.ex
index 1c03d8a..3709cc2 100644
--- a/lib/kinesis_client/stream/app_state/ecto.ex
+++ b/lib/kinesis_client/stream/app_state/ecto.ex
@@ -8,6 +8,8 @@ defmodule KinesisClient.Stream.AppState.Ecto do
   alias KinesisClient.Stream.AppState.Ecto.ShardLease
   alias KinesisClient.Stream.AppState.Ecto.ShardLeases
 
+  require Logger
+
   @migrations [
     {CreateShardLeaseTable.version(), CreateShardLeaseTable},
     {AddAppAndStreamNameColumns.version(), AddAppAndStreamNameColumns}
@@ -21,6 +23,28 @@ defmodule KinesisClient.Stream.AppState.Ecto do
     end
   end
 
+  @impl true
+  def delete_all_leases_and_restart_workers(supervisor, __app_name, opts) do
+    repo = Keyword.get(opts, :repo)
+
+    with supervisor when not is_nil(supervisor) <- Process.whereis(supervisor),
+         :ok <- repo.delete_all(ShardLease) do
+      Logger.info("Shard leases deleted")
+      Process.exit(supervisor, :shutdown)
+      Logger.info("Restarting workers")
+
+      {:ok, "Shard leases deleted and workers restarted"}
+    else
+      nil ->
+        Logger.info("Supervisor not running")
+        {:error, "Supervisor not running"}
+
+      _ ->
+        Logger.info("Failed to delete shard leases, reason unknown")
+        {:error, "Failed to delete shard leases, reason unknown"}
+    end
+  end
+
   @impl true
   def create_lease(app_name, stream_name, shard_id, lease_owner, opts) do
     repo = Keyword.get(opts, :repo)
@@ -46,8 +70,14 @@ defmodule KinesisClient.Stream.AppState.Ecto do
 
   @impl true
   def get_lease(app_name, stream_name, shard_id, opts) do
+    IO.inspect("ecto get_lease called")
     repo = Keyword.get(opts, :repo)
+    IO.puts("repo: #{inspect(repo)}")
     shard_lease_params = %{shard_id: shard_id, app_name: app_name, stream_name: stream_name}
+    IO.puts("get_lease: params: #{inspect(shard_lease_params)}")
+
+    IO.puts("get_lease: get_shard_lease result")
+    IO.puts(inspect(ShardLeases.get_shard_lease(shard_lease_params, repo)))
 
     with {:ok, shard_lease} <- ShardLeases.get_shard_lease(shard_lease_params, repo) do
       shard_lease
diff --git a/lib/kinesis_client/stream/app_state/ecto/shard_lease.ex b/lib/kinesis_client/stream/app_state/ecto/shard_lease.ex
index 925cd39..723ac40 100644
--- a/lib/kinesis_client/stream/app_state/ecto/shard_lease.ex
+++ b/lib/kinesis_client/stream/app_state/ecto/shard_lease.ex
@@ -6,6 +6,7 @@ defmodule KinesisClient.Stream.AppState.Ecto.ShardLease do
   import Ecto.Query
 
   @fields [:shard_id, :app_name, :stream_name, :lease_owner, :lease_count, :checkpoint, :completed]
+  @required_fields [:shard_id, :app_name, :stream_name, :lease_owner]
 
   @primary_key {:shard_id, :string, autogenerate: false}
   schema "shard_lease" do
@@ -20,6 +21,7 @@ defmodule KinesisClient.Stream.AppState.Ecto.ShardLease do
   def changeset(shard_lease, attrs) do
     shard_lease
     |> cast(attrs, @fields)
+    |> validate_required(@required_fields)
     |> unique_constraint(:shard_id, name: :shard_lease_pkey)
   end
 
@@ -32,6 +34,8 @@ defmodule KinesisClient.Stream.AppState.Ecto.ShardLease do
   end
 
   defp query_by({:shard_id, shard_id}, query) do
+    IO.inspect("query_by shard_id: #{inspect(shard_id)}, query: #{inspect(query)}")
+
     where(query, [sl], sl.shard_id == ^shard_id)
   end
 
diff --git a/lib/kinesis_client/stream/app_state/ecto/shard_leases.ex b/lib/kinesis_client/stream/app_state/ecto/shard_leases.ex
index ec36137..c7b472d 100644
--- a/lib/kinesis_client/stream/app_state/ecto/shard_leases.ex
+++ b/lib/kinesis_client/stream/app_state/ecto/shard_leases.ex
@@ -1,8 +1,16 @@
 defmodule KinesisClient.Stream.AppState.Ecto.ShardLeases do
+  @moduledoc false
   alias KinesisClient.Stream.AppState.Ecto.ShardLease
 
   @spec get_shard_lease(map, Ecto.Repo.t()) :: {:error, :not_found} | {:ok, ShardLease.t()}
   def get_shard_lease(params, repo) do
+    IO.inspect("get_shard_lease: repo: #{inspect(repo)}")
+    IO.inspect("get_shard_lease: params: #{inspect(params)}")
+
+    IO.inspect(
+      "get_shard_lease: build_get_query #{inspect(ShardLease.build_get_query(ShardLease.query(), params))}"
+    )
+
     ShardLease.query()
     |> ShardLease.build_get_query(params)
     |> repo.one()
@@ -15,8 +23,7 @@ defmodule KinesisClient.Stream.AppState.Ecto.ShardLeases do
   @spec get_shard_lease_by_id(String.t(), Ecto.Repo.t()) ::
           {:error, :not_found} | {:ok, ShardLease.t()}
   def get_shard_lease_by_id(shard_id, repo) do
-    %{shard_id: shard_id}
-    |> get_shard_lease(repo)
+    get_shard_lease(%{shard_id: shard_id}, repo)
   end
 
   @spec insert_shard_lease(map, Ecto.Repo.t()) ::
diff --git a/lib/kinesis_client/stream/shard/producer.ex b/lib/kinesis_client/stream/shard/producer.ex
index d76bedf..07db7e2 100644
--- a/lib/kinesis_client/stream/shard/producer.ex
+++ b/lib/kinesis_client/stream/shard/producer.ex
@@ -164,6 +164,7 @@ defmodule KinesisClient.Stream.Shard.Producer do
 
     :ok =
       AppState.update_checkpoint(
+        state.app_name,
         state.shard_id,
         state.stream_name,
         state.lease_owner,
diff --git a/test/kinesis_client/stream/app_state/dynamo_test.exs b/test/kinesis_client/stream/app_state/dynamo_test.exs
index faea028..5769fa5 100644
--- a/test/kinesis_client/stream/app_state/dynamo_test.exs
+++ b/test/kinesis_client/stream/app_state/dynamo_test.exs
@@ -12,6 +12,9 @@ defmodule KinesisClient.Stream.AppState.DynamoTest do
       app_name |> Dynamo.create_table("shard_id", %{shard_id: :string}, 1, 1) |> ExAws.request()
 
     :ok = confirm_table_created(app_name)
+
+    TestSupervisor.start_link([])
+
     %{app_name: app_name}
   end
 
@@ -27,6 +30,57 @@ defmodule KinesisClient.Stream.AppState.DynamoTest do
     end
   end
 
+  describe "delete_all_leases_and_restart_workers/2" do
+    test "handles business", context do
+      app_name = context[:app_name]
+      supervisor = TestSupervisor
+
+      shard_leases = [
+        %ShardLease{shard_id: "shard12", lease_owner: "owner1", completed: false, lease_count: 1},
+        %ShardLease{shard_id: "shard13", lease_owner: "owner2", completed: false, lease_count: 1}
+      ]
+
+      Enum.each(shard_leases, fn lease ->
+        app_name |> Dynamo.put_item(lease) |> ExAws.request()
+      end)
+
+      shard_id = "shard12"
+
+      case app_name
+           |> Dynamo.get_item(%{"shard_id" => shard_id})
+           |> ExAws.request() do
+        {:ok, item} ->
+          assert item["Item"]["shard_id"] == %{"S" => "shard12"}
+      end
+
+      assert {:ok, "Shard leases deleted and workers restarted"} =
+               AppState.delete_all_leases_and_restart_workers(supervisor, app_name, [])
+
+      case app_name
+           |> Dynamo.get_item(%{"shard_id" => shard_id})
+           |> ExAws.request() do
+        {:ok, item} ->
+          assert item["Item"]["shard_id"] == nil
+      end
+    end
+
+    test "errors with invalid app/table" do
+      app_name = "nope"
+      supervisor = TestSupervisor
+
+      assert {:error, {"ResourceNotFoundException", "Cannot do operations on a non-existent table"}} =
+               AppState.delete_all_leases_and_restart_workers(supervisor, app_name, [])
+    end
+
+    test "errors with invalid process", context do
+      app_name = context[:app_name]
+      supervisor = FakeProcess
+
+      assert {:error, "Supervisor not running"} =
+               AppState.delete_all_leases_and_restart_workers(supervisor, app_name, [])
+    end
+  end
+
   describe "create_lease/3" do
     test "lease created and :ok returned if no record for shard exists", %{app_name: app_name} do
       result = AppState.create_lease(app_name, random_string(), worker_ref(), [])
diff --git a/test/kinesis_client/stream/app_state/ecto/shard_leases_test.exs b/test/kinesis_client/stream/app_state/ecto/shard_leases_test.exs
index 49cf274..874863d 100644
--- a/test/kinesis_client/stream/app_state/ecto/shard_leases_test.exs
+++ b/test/kinesis_client/stream/app_state/ecto/shard_leases_test.exs
@@ -6,11 +6,15 @@ defmodule KinesisClient.Stream.AppState.Ecto.ShardLeasesTest do
 
   test "get_shard_lease/2" do
     params = %{
-      shard_id: "a.b.c"
+      shard_id: "a.b.c",
+      app_name: "app_name",
+      stream_name: "stream_name"
     }
 
     {:ok, shard_lease} = ShardLeases.get_shard_lease(params, Repo)
 
+    IO.inspect(shard_lease)
+
     assert shard_lease.shard_id == "a.b.c"
     assert shard_lease.checkpoint == nil
     assert shard_lease.completed == false
@@ -34,7 +38,9 @@ defmodule KinesisClient.Stream.AppState.Ecto.ShardLeasesTest do
         shard_id: "a.b.c",
         completed: false,
         lease_count: 1,
-        lease_owner: "test_owner"
+        lease_owner: "test_owner",
+        app_name: "test_app",
+        stream_name: "test_stream"
       }
 
       {:ok, shard_lease} = ShardLeases.insert_shard_lease(attrs, Repo)
@@ -51,7 +57,9 @@ defmodule KinesisClient.Stream.AppState.Ecto.ShardLeasesTest do
         shard_id: "a.b.c",
         completed: false,
         lease_count: "INVALID",
-        lease_owner: "test_owner"
+        lease_owner: "test_owner",
+        app_name: "test_app",
+        stream_name: "test_stream"
       }
 
       {:error, changeset} = ShardLeases.insert_shard_lease(attrs, Repo)
diff --git a/test/kinesis_client/stream/app_state/ecto_test.exs b/test/kinesis_client/stream/app_state/ecto_test.exs
index 03873f1..c5391ea 100644
--- a/test/kinesis_client/stream/app_state/ecto_test.exs
+++ b/test/kinesis_client/stream/app_state/ecto_test.exs
@@ -5,7 +5,7 @@ defmodule KinesisClient.Stream.AppState.EctoTest do
   alias KinesisClient.Stream.AppState.Ecto
 
   test "creates a shard_lease" do
-    assert Ecto.create_lease("", "stream_name", "a.b.c", "test_owner", repo: Repo) == :ok
+    assert Ecto.create_lease("app_name", "stream_name", "a.b.c", "test_owner", repo: Repo) == :ok
   end
 
   test "gets a shard_lease" do
@@ -56,4 +56,27 @@ defmodule KinesisClient.Stream.AppState.EctoTest do
   test "closes shard" do
     assert Ecto.close_shard("app_name", "stream_name", "a.b.c", "test_owner", repo: Repo) == :ok
   end
+
+  describe "delete_all_leases_and_restart_workers" do
+    setup do
+      Process.flag(:trap_exit, true)
+
+      TestSupervisor.start_link([])
+      {:ok, supervisor: TestSupervisor}
+    end
+
+    test "deletes all leases and restarts the supervisor if the supervisor is running", %{
+      supervisor: supervisor
+    } do
+      result = Ecto.delete_all_leases_and_restart_workers(supervisor, "app_name", repo: Repo)
+      assert result == {:ok, "Shard leases deleted and workers restarted"}
+    end
+
+    test "returns an error if the supervisor is not found", _context do
+      result =
+        Ecto.delete_all_leases_and_restart_workers(:non_existent_supervisor, "app_name", repo: Repo)
+
+      assert result == {:error, "Supervisor not running"}
+    end
+  end
 end
diff --git a/test/support/ecto_repo.ex b/test/support/ecto_repo.ex
index 2f7ae42..4dc5d3e 100644
--- a/test/support/ecto_repo.ex
+++ b/test/support/ecto_repo.ex
@@ -33,4 +33,8 @@ defmodule KinesisClient.Ecto.Repo do
   def update(changeset, _opts) do
     {:error, changeset}
   end
+
+  def delete_all(_query, _opts \\ []) do
+    :ok
+  end
 end
diff --git a/test/support/test_generic_worker.ex b/test/support/test_generic_worker.ex
new file mode 100644
index 0000000..ecaf005
--- /dev/null
+++ b/test/support/test_generic_worker.ex
@@ -0,0 +1,20 @@
+defmodule TestGenericWorker do
+  @moduledoc false
+  use GenServer
+
+  def start_link(opts) do
+    GenServer.start_link(__MODULE__, opts, name: __MODULE__)
+  end
+
+  def init(initial_value) do
+    {:ok, initial_value}
+  end
+
+  def get_value do
+    GenServer.call(__MODULE__, :get_value)
+  end
+
+  def handle_call(:get_value, _from, state) do
+    {:reply, state, state}
+  end
+end
diff --git a/test/support/test_supervisor.ex b/test/support/test_supervisor.ex
new file mode 100644
index 0000000..269e9d7
--- /dev/null
+++ b/test/support/test_supervisor.ex
@@ -0,0 +1,21 @@
+defmodule TestSupervisor do
+  @moduledoc false
+  use Supervisor
+
+  def start_link(opts) do
+    Supervisor.start_link(__MODULE__, opts, name: __MODULE__)
+  end
+
+  def init(_opts) do
+    children = [
+      %{
+        id: TestGenericWorker,
+        start: {TestGenericWorker, :start_link, [arg_value: "initial_value"]},
+        type: :worker,
+        restart: :permanent
+      }
+    ]
+
+    Supervisor.init(children, strategy: :one_for_one)
+  end
+end