[SOLR-11293] Possible data loss when index of tlog replica is not empty but latestVersions of master equals 0

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 7.2, 8.0
• Assignee: Cao Manh Dat
• Reporter: Noble Paul
• Created: 28/Aug/17 00:16
• Updated: 02/Oct/19 17:30
• Resolved: 09/Dec/17 00:06

Description

From ReplicationHandler

      if (latestVersion == 0L) {
        if (forceReplication && commit.getGeneration() != 0) {
          solrCore.getIndexWriter().deleteAll();
          solrCore.getUpdateHandler().commit(new CommitUpdateCommand(req, false));
        }
        return success;
      }

The inconsistent happens when commit version of master equals 0 but tlog replica does not clear its index.

https://jenkins.thetaphi.de/job/Lucene-Solr-master-MacOSX/4140/testReport/org.apache.solr.cloud/HttpPartitionTest/test/

Error Message

Doc with id=1 not found in http://127.0.0.1:60897/b/xj/collMinRf_1x3 due to: Path not found: /id; rsp={doc=null}
Stacktrace

java.lang.AssertionError: Doc with id=1 not found in http://127.0.0.1:60897/b/xj/collMinRf_1x3 due to: Path not found: /id; rsp={doc=null}
	at __randomizedtesting.SeedInfo.seed([ACF841744A332569:24AC7EAEE4CF4891]:0)
	at org.junit.Assert.fail(Assert.java:93)
	at org.junit.Assert.assertTrue(Assert.java:43)
	at org.apache.solr.cloud.HttpPartitionTest.assertDocExists(HttpPartitionTest.java:603)
	at org.apache.solr.cloud.HttpPartitionTest.assertDocsExistInAllReplicas(HttpPartitionTest.java:558)
	at org.apache.solr.cloud.HttpPartitionTest.testMinRf(HttpPartitionTest.java:249)
	at org.apache.solr.cloud.HttpPartitionTest.test(HttpPartitionTest.java:127)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

Issue Links

• breaks: SOLR-11452 TestTlogReplica.testOnlyLeaderIndexes() failure