kotman12 commented on code in PR #3477:
URL: https://github.com/apache/solr/pull/3477#discussion_r2277706393


##########
solr/core/src/test/org/apache/solr/update/SolrIndexFingerprintTest.java:
##########
@@ -28,29 +29,21 @@ public class SolrIndexFingerprintTest extends 
SolrTestCaseJ4 {
 
   @BeforeClass
   public static void beforeTests() throws Exception {
-    initCore("solrconfig.xml", "schema.xml");
+    initCore("solrconfig-tiny-segments.xml", "schema.xml");
   }
 
   @Test
   public void testSequentialVsParallelFingerprint() throws Exception {
     long maxVersion = Long.MAX_VALUE;
     SolrCore core = h.getCore();
 
-    // Create a set of 3 segments
-    assertU(adoc("id", "101"));
-    assertU(adoc("id", "102"));
-    assertU(adoc("id", "103"));
-    assertU(commit());
-
-    assertU(adoc("id", "104"));
-    assertU(adoc("id", "105"));
-    assertU(adoc("id", "106"));
-    assertU(commit());
-
-    assertU(adoc("id", "107"));
-    assertU(adoc("id", "108"));
-    assertU(adoc("id", "109"));
-    assertU(commit());
+    // Create a set of 500 segments (to catch race conditions, i.e.SOLR-17863)
+    IntStream.range(0, 500)
+        .forEach(
+            i -> {
+              assertU(adoc("id", "" + i));
+              assertU(commit());

Review Comment:
   to reliably make 500 segments .. I think so? To tickle this race condition 
you need lots of leaves. Is there a better way?



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