+ arvadostest.ActiveUserUUID, coll.UUID, "", "bar")
+ }
+ }
+}
+
+func (s *IntegrationSuite) TestConcurrentWrites(c *check.C) {
+ s.handler.Cluster.Collections.WebDAVCache.TTL = arvados.Duration(time.Second * 2)
+ lockTidyInterval = time.Second
+ client := arvados.NewClientFromEnv()
+ client.AuthToken = arvadostest.ActiveTokenV2
+ // Start small, and increase concurrency (2^2, 4^2, ...)
+ // only until hitting failure. Avoids unnecessarily long
+ // failure reports.
+ for n := 2; n < 16 && !c.Failed(); n = n * 2 {
+ c.Logf("%s: n=%d", c.TestName(), n)
+
+ var coll arvados.Collection
+ err := client.RequestAndDecode(&coll, "POST", "arvados/v1/collections", nil, nil)
+ c.Assert(err, check.IsNil)
+ defer client.RequestAndDecode(&coll, "DELETE", "arvados/v1/collections/"+coll.UUID, nil, nil)
+
+ var wg sync.WaitGroup
+ for i := 0; i < n && !c.Failed(); i++ {
+ i := i
+ wg.Add(1)
+ go func() {
+ defer wg.Done()
+ u := mustParseURL(fmt.Sprintf("http://%s.collections.example.com/i=%d", coll.UUID, i))
+ resp := httptest.NewRecorder()
+ req, err := http.NewRequest("MKCOL", u.String(), nil)
+ c.Assert(err, check.IsNil)
+ req.Header.Set("Authorization", "Bearer "+client.AuthToken)
+ s.handler.ServeHTTP(resp, req)
+ c.Assert(resp.Code, check.Equals, http.StatusCreated)
+ for j := 0; j < n && !c.Failed(); j++ {
+ j := j
+ wg.Add(1)
+ go func() {
+ defer wg.Done()
+ content := fmt.Sprintf("i=%d/j=%d", i, j)
+ u := mustParseURL("http://" + coll.UUID + ".collections.example.com/" + content)
+
+ resp := httptest.NewRecorder()
+ req, err := http.NewRequest("PUT", u.String(), strings.NewReader(content))
+ c.Assert(err, check.IsNil)
+ req.Header.Set("Authorization", "Bearer "+client.AuthToken)
+ s.handler.ServeHTTP(resp, req)
+ c.Check(resp.Code, check.Equals, http.StatusCreated)
+
+ time.Sleep(time.Second)
+ resp = httptest.NewRecorder()
+ req, err = http.NewRequest("GET", u.String(), nil)
+ c.Assert(err, check.IsNil)
+ req.Header.Set("Authorization", "Bearer "+client.AuthToken)
+ s.handler.ServeHTTP(resp, req)
+ c.Check(resp.Code, check.Equals, http.StatusOK)
+ c.Check(resp.Body.String(), check.Equals, content)
+ }()
+ }
+ }()
+ }
+ wg.Wait()
+ for i := 0; i < n; i++ {
+ u := mustParseURL(fmt.Sprintf("http://%s.collections.example.com/i=%d", coll.UUID, i))
+ resp := httptest.NewRecorder()
+ req, err := http.NewRequest("PROPFIND", u.String(), &bytes.Buffer{})
+ c.Assert(err, check.IsNil)
+ req.Header.Set("Authorization", "Bearer "+client.AuthToken)
+ s.handler.ServeHTTP(resp, req)
+ c.Assert(resp.Code, check.Equals, http.StatusMultiStatus)