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Minor cleanup in the InternalEngine #29241

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merged 3 commits into from
Apr 2, 2018
Merged

Minor cleanup in the InternalEngine #29241

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8099b66
loadOrGenerateHistoryUUID does not generate a HistoryUUID and cannot …
DaveCTurner Mar 21, 2018
f46c6be
Move try next to acquire() call
DaveCTurner Mar 21, 2018
96599f5
Merge branch 'master' into 2018-03-21-engine-minor-cleanup
DaveCTurner Mar 28, 2018
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12 changes: 6 additions & 6 deletions server/src/main/java/org/elasticsearch/index/engine/InternalEngine.java
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Original file line number Diff line number Diff line change
Expand Up @@ -187,8 +187,7 @@ public InternalEngine(EngineConfig engineConfig) {
translog::getLastSyncedGlobalCheckpoint, startingCommit);
writer = createWriter(startingCommit);
updateMaxUnsafeAutoIdTimestampFromWriter(writer);
historyUUID = loadOrGenerateHistoryUUID(writer);
Objects.requireNonNull(historyUUID, "history uuid should not be null");
historyUUID = loadHistoryUUID(writer);
indexWriter = writer;
} catch (IOException | TranslogCorruptedException e) {
throw new EngineCreationFailureException(shardId, "failed to create engine", e);
Expand Down Expand Up @@ -277,10 +276,11 @@ protected IndexSearcher refreshIfNeeded(IndexSearcher referenceToRefresh) throws
// steal it by calling incRef on the "stolen" reader
internalSearcherManager.maybeRefreshBlocking();
IndexSearcher acquire = internalSearcherManager.acquire();
final IndexReader previousReader = referenceToRefresh.getIndexReader();
assert previousReader instanceof ElasticsearchDirectoryReader:
"searcher's IndexReader should be an ElasticsearchDirectoryReader, but got " + previousReader;
try {
final IndexReader previousReader = referenceToRefresh.getIndexReader();
assert previousReader instanceof ElasticsearchDirectoryReader:
"searcher's IndexReader should be an ElasticsearchDirectoryReader, but got " + previousReader;

final IndexReader newReader = acquire.getIndexReader();
if (newReader == previousReader) {
// nothing has changed - both ref managers share the same instance so we can use reference equality
Expand Down Expand Up @@ -495,7 +495,7 @@ private String loadTranslogUUIDFromLastCommit() throws IOException {
/**
* Reads the current stored history ID from the IW commit data.
*/
private String loadOrGenerateHistoryUUID(final IndexWriter writer) throws IOException {
private String loadHistoryUUID(final IndexWriter writer) throws IOException {
final String uuid = commitDataAsMap(writer).get(HISTORY_UUID_KEY);
if (uuid == null) {
throw new IllegalStateException("commit doesn't contain history uuid");
Expand Down