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Small fixes: 

- rename one method
  - move "generation == null" check under existing "if (createNew == false)"
  - fix typo/whitespace
  - add a TODO
This commit is contained in:
Michael McCandless 2015-05-15 10:47:17 -04:00 committed by mikemccand
parent 50c771be29
commit a42d92df21
3 changed files with 15 additions and 12 deletions
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10
src/main/java/org/elasticsearch/index/engine/InternalEngine.java
View File

@ -131,6 +131,8 @@ public class InternalEngine extends Engine {
this.searcherFactory = new SearchFactory(engineConfig);
final Translog.TranslogGeneration translogGeneration;
try {
// TODO: would be better if ES could tell us "from above" whether this shard was already here, instead of using Lucene's API
// (which relies on IO ops, directory listing, and has had scary bugs in the past):
boolean create = !Lucene.indexExists(store.directory());
writer = createWriter(create);
indexWriter = writer;
@ -175,7 +177,12 @@ public class InternalEngine extends Engine {
private Translog openTranslog(EngineConfig engineConfig, IndexWriter writer, boolean createNew) throws IOException {
final Translog.TranslogGeneration generation = loadTranslogIdFromCommit(writer);
final TranslogConfig translogConfig = engineConfig.getTranslogConfig();
if (createNew == false) {
// We expect that this shard already exists, so it must already have an existing translog else something is badly wrong!
if (generation == null) {
throw new IllegalStateException("no translog generation present in commit data but translog is expected to exist");
}
translogConfig.setTranslogGeneration(generation);
if (generation != null && generation.translogUUID == null) {
// only upgrade on pre-2.0 indices...
@ -184,9 +191,6 @@ public class InternalEngine extends Engine {
}
final Translog translog = new Translog(translogConfig);
if (generation == null) {
if (createNew == false) {
throw new IllegalStateException("no tranlog generation present in commit data but translog is expected to exist");
}
logger.debug("no translog ID present in the current generation - creating one");
commitIndexWriter(writer, translog);
}

1
src/main/java/org/elasticsearch/index/engine/InternalEngineFactory.java
View File

@ -16,6 +16,7 @@
* specific language governing permissions and limitations
* under the License.
*/
package org.elasticsearch.index.engine;
public class InternalEngineFactory implements EngineFactory {

16
src/main/java/org/elasticsearch/index/translog/Translog.java
View File

@ -251,12 +251,10 @@ public class Translog extends AbstractIndexShardComponent implements IndexShardC
Checkpoint.write(translogPath.resolve(CHECKPOINT_FILE_NAME), checkpoint, StandardOpenOption.WRITE, StandardOpenOption.CREATE_NEW);
} else {
Checkpoint checkpoint = new Checkpoint(Files.size(target), -1, generation);
Checkpoint.write(translogPath.resolve(getCommitFileName(generation)), checkpoint, StandardOpenOption.WRITE, StandardOpenOption.CREATE_NEW);
Checkpoint.write(translogPath.resolve(getCommitCheckpointFileName(generation)), checkpoint, StandardOpenOption.WRITE, StandardOpenOption.CREATE_NEW);
}
}
IOUtils.fsync(translogPath, true);
}
@ -275,12 +273,12 @@ public class Translog extends AbstractIndexShardComponent implements IndexShardC
if (Files.exists(committedTranslogFile) == false) {
throw new IllegalStateException("translog file doesn't exist with generation: " + i + " lastCommitted: " + lastCommittedTranslogFileGeneration + " checkpoint: " + checkpoint.generation + " - translog ids must be consecutive");
}
final ImmutableTranslogReader reader = openReader(committedTranslogFile, Checkpoint.read(location.resolve(getCommitFileName(i))));
final ImmutableTranslogReader reader = openReader(committedTranslogFile, Checkpoint.read(location.resolve(getCommitCheckpointFileName(i))));
foundTranslogs.add(reader);
logger.debug("recovered local translog from checkpoint {}", checkpoint);
}
foundTranslogs.add(openReader(location.resolve(checkpointTranslogFile), checkpoint));
Path commitCheckpoint = location.resolve(getCommitFileName(checkpoint.generation));
Path commitCheckpoint = location.resolve(getCommitCheckpointFileName(checkpoint.generation));
Files.copy(location.resolve(CHECKPOINT_FILE_NAME), commitCheckpoint);
IOUtils.fsync(commitCheckpoint, false);
IOUtils.fsync(commitCheckpoint.getParent(), true);
@ -544,7 +542,7 @@ public class Translog extends AbstractIndexShardComponent implements IndexShardC
return TRANSLOG_FILE_PREFIX + generation + TRANSLOG_FILE_SUFFIX;
}
static String getCommitFileName(long generation) {
static String getCommitCheckpointFileName(long generation) {
return TRANSLOG_FILE_PREFIX + generation + CHECKPOINT_SUFFIX;
}
@ -591,7 +589,7 @@ public class Translog extends AbstractIndexShardComponent implements IndexShardC
// if the given translogPath is not the current we can safely delete the file since all references are released
logger.trace("delete translog file - not referenced and not current anymore {}", translogPath);
IOUtils.deleteFilesIgnoringExceptions(translogPath);
IOUtils.deleteFilesIgnoringExceptions(translogPath.resolveSibling(getCommitFileName(channelReference.getGeneration())));
IOUtils.deleteFilesIgnoringExceptions(translogPath.resolveSibling(getCommitCheckpointFileName(channelReference.getGeneration())));
}
try (DirectoryStream<Path> stream = Files.newDirectoryStream(location)) {
@ -602,7 +600,7 @@ public class Translog extends AbstractIndexShardComponent implements IndexShardC
if (isReferencedGeneration(generation) == false) {
logger.trace("delete translog file - not referenced and not current anymore {}", path);
IOUtils.deleteFilesIgnoringExceptions(path);
IOUtils.deleteFilesIgnoringExceptions(path.resolveSibling(getCommitFileName(channelReference.getGeneration())));
IOUtils.deleteFilesIgnoringExceptions(path.resolveSibling(getCommitCheckpointFileName(channelReference.getGeneration())));
}
}
}
@ -1660,7 +1658,7 @@ public class Translog extends AbstractIndexShardComponent implements IndexShardC
currentCommittingTranslog = current.immutableReader();
Path checkpoint = location.resolve(CHECKPOINT_FILE_NAME);
assert Checkpoint.read(checkpoint).generation == currentCommittingTranslog.getGeneration();
Path commitCheckpoint = location.resolve(getCommitFileName(currentCommittingTranslog.getGeneration()));
Path commitCheckpoint = location.resolve(getCommitCheckpointFileName(currentCommittingTranslog.getGeneration()));
Files.copy(checkpoint, commitCheckpoint);
IOUtils.fsync(commitCheckpoint, false);
IOUtils.fsync(commitCheckpoint.getParent(), true);