# Org.elasticsearch.index.engine.FlushFailedEngineException **URL:** \ **Category:** Elasticsearch\ **Created:** [September 25, 2012, 8:21pm UTC](https://discuss.elastic.co/t/org-elasticsearch-index-engine-flushfailedengineexception/9140 "2012-09-25T20:21:21Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Jae](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jae/32/791_2.png) [@Jae](https://discuss.elastic.co/u/Jae)\ **Post date:** [September 25, 2012, 8:21pm UTC](https://discuss.elastic.co/t/org-elasticsearch-index-engine-flushfailedengineexception/9140/1 "2012-09-25T20:21:21Z")
I am running elasticsearch 0.19.9 with 36 instances. I saw the following exceptions. Is it safe to be ignored? Otherwise, how can I tune the parameter? [2012-09-25 17:40:26,436][WARN][index.translog] [Archimage] [request\_trace20120925][0] failed to flush shard on translog threshold org.elasticsearch.index.engine.FlushFailedEngineException: [request\_trace20120925][0] Flush failed at org.elasticsearch.index.engine.robin.RobinEngine.flush(RobinEngine.java:903) at org.elasticsearch.index.shard.service.InternalIndexShard.flush(InternalIndexShard.java:467) at org.elasticsearch.index.translog.TranslogService$TranslogBasedFlush$1.run(TranslogService.java:191) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:662) Caused by: java.lang.NullPointerException at org.elasticsearch.common.compress.BufferRecycler.releaseEncodeBuffer(BufferRecycler.java:68) at org.elasticsearch.common.compress.lzf.ChunkEncoder.close(ChunkEncoder.java:113) at org.elasticsearch.common.compress.lzf.LZFCompressedIndexOutput.doClose(LZFCompressedIndexOutput.java:63) at org.elasticsearch.common.compress.CompressedIndexOutput.close(CompressedIndexOutput.java:184) at org.elasticsearch.index.store.Store$StoreIndexOutput.close(Store.java:645) at org.apache.lucene.util.IOUtils.close(IOUtils.java:141) at org.apache.lucene.index.FieldsWriter.close(FieldsWriter.java:139) at org.apache.lucene.index.StoredFieldsWriter.flush(StoredFieldsWriter.java:55) at org.apache.lucene.index.DocFieldProcessor.flush(DocFieldProcessor.java:59) at org.apache.lucene.index.DocumentsWriter.flush(DocumentsWriter.java:581) at org.apache.lucene.index.IndexWriter.doFlush(IndexWriter.java:3587) at org.apache.lucene.index.IndexWriter.prepareCommit(IndexWriter.java:3376) at org.apache.lucene.index.IndexWriter.commitInternal(IndexWriter.java:3485) at org.apache.lucene.index.IndexWriter.commit(IndexWriter.java:3467) at org.elasticsearch.index.engine.robin.RobinEngine.flush(RobinEngine.java:871) ... 5 more Thank you Best, Jae -- ---
**Author:** ![Francois\_Forster](https://avatars.discourse-cdn.com/v4/letter/f/dfb087/32.png) [@Francois\_Forster](https://discuss.elastic.co/u/Francois_Forster)\ **Post date:** [August 27, 2013, 9:09pm UTC](https://discuss.elastic.co/t/org-elasticsearch-index-engine-flushfailedengineexception/9140/2 "2013-08-27T21:09:16Z")
I get the same exception fairly regularly with 0.20.6: [2013-08-27 13:26:05,337][WARN][action.deletebyquery] [elasticsearch-node] Failed to perform deleteByQuery/shard on replica [index][0] org.elasticsearch.transport.RemoteTransportException: [elasticsearch-node][inet[/10.10.10.10:9300]][deleteByQuery/shard/replica] Caused by: org.elasticsearch.index.engine.RefreshFailedEngineException: [search-enca][0] Refresh failed at org.elasticsearch.index.engine.robin.RobinEngine.refresh(RobinEngine.java:787) at org.elasticsearch.index.engine.robin.RobinEngine.refreshVersioningTable(RobinEngine.java:966) at org.elasticsearch.index.engine.robin.RobinEngine.delete(RobinEngine.java:728) at org.elasticsearch.index.shard.service.InternalIndexShard.deleteByQuery(InternalIndexShard.java:385) at org.elasticsearch.action.deletebyquery.TransportShardDeleteByQueryAction.shardOperationOnReplica(TransportShardDeleteByQueryAction.java:106) at org.elasticsearch.action.support.replication.TransportShardReplicationOperationAction$ReplicaOperationTransportHandler.messageReceived(TransportShardReplicationOperationAction.java:254) at org.elasticsearch.action.support.replication.TransportShardReplicationOperationAction$ReplicaOperationTransportHandler.messageReceived(TransportShardReplicationOperationAction.java:240) at org.elasticsearch.transport.netty.MessageChannelHandler$RequestHandler.run(MessageChannelHandler.java:268) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918) at java.lang.Thread.run(Thread.java:662) Caused by: java.lang.NullPointerException at org.elasticsearch.common.compress.BufferRecycler.releaseEncodeBuffer(BufferRecycler.java:68) at org.elasticsearch.common.compress.lzf.ChunkEncoder.close(ChunkEncoder.java:113) at org.elasticsearch.common.compress.lzf.LZFCompressedIndexOutput.doClose(LZFCompressedIndexOutput.java:63) at org.elasticsearch.common.compress.CompressedIndexOutput.close(CompressedIndexOutput.java:184) at org.elasticsearch.index.store.Store$StoreIndexOutput.close(Store.java:640) at org.apache.lucene.util.IOUtils.close(IOUtils.java:141) at org.apache.lucene.index.FieldsWriter.close(FieldsWriter.java:139) at org.apache.lucene.index.StoredFieldsWriter.flush(StoredFieldsWriter.java:55) at org.apache.lucene.index.DocFieldProcessor.flush(DocFieldProcessor.java:59) at org.apache.lucene.index.DocumentsWriter.flush(DocumentsWriter.java:581) at org.apache.lucene.index.IndexWriter.doFlush(IndexWriter.java:3587) at org.apache.lucene.index.IndexWriter.flush(IndexWriter.java:3552) at org.apache.lucene.index.IndexWriter.getReader(IndexWriter.java:450) at org.apache.lucene.index.IndexWriter.getReader(IndexWriter.java:399) at org.apache.lucene.index.DirectoryReader.doOpenFromWriter(DirectoryReader.java:413) at org.apache.lucene.index.DirectoryReader.doOpenIfChanged(DirectoryReader.java:432) at org.apache.lucene.index.DirectoryReader.doOpenIfChanged(DirectoryReader.java:375) at org.apache.lucene.index.IndexReader.openIfChanged(IndexReader.java:508) at org.apache.lucene.search.SearcherManager.refreshIfNeeded(SearcherManager.java:109) at org.apache.lucene.search.SearcherManager.refreshIfNeeded(SearcherManager.java:57) at org.apache.lucene.search.ReferenceManager.maybeRefresh(ReferenceManager.java:137) at org.elasticsearch.index.engine.robin.RobinEngine.refresh(RobinEngine.java:768) ... 10 more -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 6, 2017, 2:19am UTC](https://discuss.elastic.co/t/org-elasticsearch-index-engine-flushfailedengineexception/9140/3 "2017-07-06T02:19:25Z")