commit 5f3fe7a16382d371c214b9f4376c6a1f50447f79
author ILYA Khlopotov <iilyak@ca.ibm.com> Mon Sep 21 12:21:16 2015 -0700
committer ILYA Khlopotov <iilyak@ca.ibm.com> Mon Sep 28 09:25:55 2015 -0700
tree 423ee0f5685a9afe97e40e44a2d938623a942a97
parent aa72f6ffcc9c7095ed59b4d56f5f8139a5205a1f

Check if Handler module exists before we try to call update

src/couch_epi_data.erl

diff --git a/src/couch_epi_data.erl b/src/couch_epi_data.erl
index b685dae..502ed69 100644
--- a/src/couch_epi_data.erl
+++ b/src/couch_epi_data.erl
@@ -110,7 +110,15 @@
 %% Internal Function Definitions
 %% ------------------------------------------------------------------
 
-reload_if_updated(#state{hash = OldHash, module = Module} = State) ->
+reload_if_updated(#state{handle = Module} = State) ->
+    case couch_epi_util:module_exists(Module) of
+        true ->
+            do_reload_if_updated(State);
+        false ->
+            {ok, State}
+    end.
+
+do_reload_if_updated(#state{hash = OldHash, module = Module} = State) ->
     case couch_epi_functions_gen:hash([Module]) of
         OldHash ->
             {ok, State};

src/couch_epi_data_source.erl

diff --git a/src/couch_epi_data_source.erl b/src/couch_epi_data_source.erl
index f905e8f..ef83b14 100644
--- a/src/couch_epi_data_source.erl
+++ b/src/couch_epi_data_source.erl
@@ -144,7 +144,15 @@
             {error, {notfound, FilePath}}
     end.
 
-reload_if_updated(#state{hash = OldHash, locator = Locator} = State) ->
+reload_if_updated(#state{handle = Module} = State) ->
+    case couch_epi_util:module_exists(Module) of
+        true ->
+            do_reload_if_updated(State);
+        false ->
+            {ok, State}
+    end.
+
+do_reload_if_updated(#state{hash = OldHash, locator = Locator} = State) ->
     case read(Locator) of
         {ok, OldHash, _Data} ->
             {ok, State};

src/couch_epi_functions.erl

diff --git a/src/couch_epi_functions.erl b/src/couch_epi_functions.erl
index 09ece2e..33c4f91 100644
--- a/src/couch_epi_functions.erl
+++ b/src/couch_epi_functions.erl
@@ -112,7 +112,15 @@
 %% Internal Function Definitions
 %% ------------------------------------------------------------------
 
-reload_if_updated(#state{hash = OldHash, modules = Modules} = State) ->
+reload_if_updated(#state{handle = Module} = State) ->
+    case couch_epi_util:module_exists(Module) of
+        true ->
+            do_reload_if_updated(State);
+        false ->
+            {ok, State}
+    end.
+
+do_reload_if_updated(#state{hash = OldHash, modules = Modules} = State) ->
     case couch_epi_functions_gen:hash(Modules) of
         OldHash ->
             {ok, State};