Amrit Sarkar created SOLR-12957:
-----------------------------------
Summary: First batch of docs not forwarded to Target cluster with
CDCR enabled
Key: SOLR-12957
URL: https://issues.apache.org/jira/browse/SOLR-12957
Project: Solr
Issue Type: Bug
Security Level: Public (Default Security Level. Issues are Public)
Components: CDCR
Affects Versions: 7.5
Reporter: Amrit Sarkar
While writing SOLR-12057, introduced a test {{CdcrReplicaTypesTest}} where;
If we enable CDCR to start at the source and at the same time index docs;
{code}
//start CDCR
CdcrTestsUtil.cdcrStart(cluster1SolrClient);
// ADD operation on cluster 1
int batchSize = (TEST_NIGHTLY ? 100 : 10);
int numDocs_c1 = 0;
for (int k = 0; k < batchSize; k++) {
req = new UpdateRequest();
for (; numDocs_c1 < (k + 1) * 100; numDocs_c1++) {
SolrInputDocument doc = new SolrInputDocument();
doc.addField("id", "cluster1_" + numDocs_c1);
doc.addField("xyz", numDocs_c1);
req.add(doc);
}
req.setAction(AbstractUpdateRequest.ACTION.COMMIT, true, true);
log.info("Adding " + batchSize + " docs with commit=true, numDocs=" +
numDocs_c1);
req.process(cluster1SolrClient);
}
{code}
there is a race condition/code synchronization gap; where the BOOTSTRAP (the
initial CDCR synchronization process) doesn't copy anything (index files) to
target cluster (as the docs are still being written) and once the normal
replication begins, the first few batches are missed and replication begins
from later batches.
{code}
reproduce with: ant test -Dtestcase=CdcrReplicaTypesTest
-Dtests.method=testTlogReplica -Dtests.seed=2D7490F137D61C8 -Dtests.slow=true
-Dtests.badapples=true -Dtests.locale=lt -Dtests.timezone=America/Jamaica
-Dtests.asserts=true -Dtests.file.encoding=UTF-8
[beaster] [17:34:45.013] FAILURE 143s | CdcrReplicaTypesTest.testTlogReplica
<<<
[beaster] > Throwable #1: java.lang.AssertionError: cluster 1 docs
mismatch expected:<2000> but was:<1900>
{code}
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