From 1641ccea60965caca5501a17799f4edfa0e843c5 Mon Sep 17 00:00:00 2001
From: Mark Robert Miller <markrmiller@apache.org>
Date: Sat, 30 Nov 2013 03:03:44 +0000
Subject: [PATCH] SOLR-5516: wait a moment before trying to Sync

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1546683 13f79535-47bb-0310-9956-ffa450edef68
---
 .../core/src/java/org/apache/solr/cloud/SyncStrategy.java | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/solr/core/src/java/org/apache/solr/cloud/SyncStrategy.java b/solr/core/src/java/org/apache/solr/cloud/SyncStrategy.java
index 4c104269506..0b5a67a44df 100644
--- a/solr/core/src/java/org/apache/solr/cloud/SyncStrategy.java
+++ b/solr/core/src/java/org/apache/solr/cloud/SyncStrategy.java
@@ -27,6 +27,7 @@ import org.apache.solr.client.solrj.SolrServerException;
 import org.apache.solr.client.solrj.impl.HttpSolrServer;
 import org.apache.solr.client.solrj.request.CoreAdminRequest.RequestRecovery;
 import org.apache.solr.common.SolrException;
+import org.apache.solr.common.SolrException.ErrorCode;
 import org.apache.solr.common.cloud.ZkCoreNodeProps;
 import org.apache.solr.common.cloud.ZkNodeProps;
 import org.apache.solr.common.cloud.ZkStateReader;
@@ -93,6 +94,13 @@ public class SyncStrategy {
         log.error("No UpdateLog found - cannot sync");
         return false;
       }
+      // wait a second for any floating updates to finish
+      try {
+        Thread.sleep(1500);
+      } catch (InterruptedException e) {
+        Thread.currentThread().interrupt();
+        throw new SolrException(ErrorCode.SERVICE_UNAVAILABLE, e);
+      }
       success = syncReplicas(zkController, core, leaderProps);
     } finally {
       SolrRequestInfo.clearRequestInfo();