Bulk update caused DocumentMissing after Bulk Insert

Elastic Stack Elasticsearch
1

I am working on a tool which sync change from MySQL to ES. When I am testing the tool, I find some thing that can't understand. Then following is some log:

# bulk insert about 100 docs
2019-04-14 11:16:26,049 index {[test_0][news][36], source[...]}, index {..}
# bulk update 100 docs by id
2019-04-14 11:16:26,428 update {[test_0][news][36], doc[index {[null][null][null], source[{...}], detect_noop[true]}
# some docs update report DocumentMissing
item.getFailure().getCause() instanceof DocumentMissingException

So any reason why this happens? (I am using ES 5.6)

2

Any one here?

3

Can you share the details of the API calls that your tool is making and the JSON responses?

4

the request API:

  BulkRequestBuilder bulkRequest = client.prepareBulk();
  for (SyncWrapper<WriteRequest> requestWrapper : aim) {
    WriteRequest request = requestWrapper.getData();
    if (request instanceof IndexRequest) {
      bulkRequest.add((IndexRequest) request);
    } else if (request instanceof UpdateRequest) {
      bulkRequest.add(((UpdateRequest) request));
    } else if (request instanceof DeleteRequest) {
      bulkRequest.add(((DeleteRequest) request));
    }
  }
  ListenableActionFuture<BulkResponse> future = bulkRequest.execute();

the response API:

  BulkResponse bulkResponse = future.get();
  if (bulkResponse.hasFailures()) {
    BulkItemResponse[] items = bulkResponse.getItems();
    for (item in items) {
      if (item.getFailure().getCause() instanceof DocumentMissingException) {}
    }
 }
5

I tried but failed to reproduce this on 5.6.16.

I made index.json containing 100 requests:

{"index":{"_type":"news","_id":"1","_index":"test_0"}}
{"foo":"bar"}
{"index":{"_type":"news","_id":"2","_index":"test_0"}}
{"foo":"bar"}
...
{"index":{"_type":"news","_id":"100","_index":"test_0"}}
{"foo":"bar"}

I made update.json also containing 100 requests:

{"update":{"_type":"news","_id":"1","_index":"test_0"}}
{"doc":{"foo":"baz"}}
{"update":{"_type":"news","_id":"2","_index":"test_0"}}
{"doc":{"foo":"baz"}}
...
{"update":{"_type":"news","_id":"100","_index":"test_0"}}
{"doc":{"foo":"baz"}}

I created a new index and immediately ran these bulk requests and saw no errors:

$ curl -XDELETE 'http://localhost:9200/test_0?pretty'; curl -XPUT 'http://localhost:9200/test_0?pretty' -H 'Content-type: application/json' --data-binary $'{"settings":{"number_of_shards":2,"number_of_replicas":1}}'; curl 'http://localhost:9200/_bulk?pretty&filter_path=errors' -H 'Content-type: application/x-ndjson' --data-binary @index.json; curl 'http://localhost:9200/_bulk?pretty&filter_path=errors' -H 'Content-type: application/x-ndjson' --data-binary @update.json
{
  "acknowledged" : true,
  "shards_acknowledged" : true,
  "index" : "test_0"
}
{
  "errors" : false
}
{
  "errors" : false
}

Can you describe how to reproduce the problem you're seeing like this?

6

I think I found the error, the index request the update request is made by two thread, so even though index request is a little bit faster, we can't ensure the order between those two batch. Thanks for your help.

2 Likes
7

Ah yes that'd explain it. You have to wait for the response from the indexing request before doing the update, otherwise it's not really "after".

1 Like
8

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