From 1469fb74754ebbff0632de69378b0e7406f0e0f3 Mon Sep 17 00:00:00 2001
From: jiangph <jiangph@cn.ibm.com>
Date: Tue, 13 Oct 2020 10:55:21 +0800
Subject: convert erlfdb_error 2101 to transaction_too_large

---
 src/chttpd/src/chttpd.erl           |  5 +++++
 test/elixir/test/bulk_docs_test.exs | 18 ++++++++++++++++++
 2 files changed, 23 insertions(+)

diff --git a/src/chttpd/src/chttpd.erl b/src/chttpd/src/chttpd.erl
index 3962c8601..ebfbd04ab 100644
--- a/src/chttpd/src/chttpd.erl
+++ b/src/chttpd/src/chttpd.erl
@@ -351,6 +351,8 @@ catch_error(HttpReq, throw, Error) ->
     send_error(HttpReq, Error);
 catch_error(HttpReq, error, database_does_not_exist) ->
     send_error(HttpReq, database_does_not_exist);
+catch_error(HttpReq, error, {erlfdb_error, 2101}) ->
+    send_error(HttpReq, transaction_too_large);
 catch_error(HttpReq, Tag, Error) ->
     Stack = erlang:get_stacktrace(),
     % TODO improve logging and metrics collection for client disconnects
@@ -983,6 +985,9 @@ error_info({request_entity_too_large, {attachment, AttName}}) ->
     {413, <<"attachment_too_large">>, AttName};
 error_info({request_entity_too_large, DocID}) ->
     {413, <<"document_too_large">>, DocID};
+error_info(transaction_too_large) ->
+    {413, <<"transaction_too_large">>,
+        <<"The request transaction is larger than 10MB" >>};
 error_info({error, security_migration_updates_disabled}) ->
     {503, <<"security_migration">>, <<"Updates to security docs are disabled during "
         "security migration.">>};
diff --git a/test/elixir/test/bulk_docs_test.exs b/test/elixir/test/bulk_docs_test.exs
index cbbc53340..41690fe12 100644
--- a/test/elixir/test/bulk_docs_test.exs
+++ b/test/elixir/test/bulk_docs_test.exs
@@ -130,6 +130,17 @@ defmodule BulkDocsTest do
     assert Enum.at(rows, 2)["error"] == "conflict"
   end
 
+  @tag :with_db
+  test "bulk docs raises transaction_too_large error for transaction larger than 10MB", ctx do
+    docs = [%{_id: "0", a: random_string(16_000_000)}]
+    old_size = Couch.get("/_node/node1@127.0.0.1/_config/couchdb/max_document_size").body
+    set_config_raw("couchdb", "max_document_size", "67108864") # 64M
+    resp = Couch.post("/#{ctx[:db_name]}/_bulk_docs", body: %{docs: docs})
+    set_config_raw("couchdb", "max_document_size", old_size) # set back
+    assert resp.status_code == 413
+    assert resp.body["error"] == "transaction_too_large"
+  end
+
   defp bulk_post(docs, db) do
     retry_until(fn ->
       resp = Couch.post("/#{db}/_bulk_docs", body: %{docs: docs})
@@ -152,4 +163,11 @@ defmodule BulkDocsTest do
     assert resp.body["error"] == "bad_request"
     assert resp.body["reason"] == reason
   end
+
+  defp random_string(length) do
+    raw = :crypto.strong_rand_bytes(length)
+    raw
+    |> Base.url_encode64
+    |> binary_part(0, length)
+  end
 end
-- 
cgit v1.2.1