求解，为何 es 脚本在超过 10 个文档后报出越界异常

在聚合中添加脚本

{"aggs": { "gwAppName": { "terms": { "field": "field", "script": { "source": "doc['field1'].empty?doc['field'].value:doc['field1'].value", "lang": "painless" } } } } 

字段结构

field 与 field1 均为 keyword

field 保证绝对有值，field1 不一定有值

报错

在前 10 条数据时，聚合正常

在超过 10 条数据时异常报错

{ "error": { "root_cause": [ { "type": "script_exception", "reason": "runtime error", "script_stack": [ "java.nio.Buffer.checkIndex(Buffer.java:540)", "java.nio.DirectByteBuffer.get(DirectByteBuffer.java:253)", "org.apache.lucene.store.ByteBufferGuard.getByte(ByteBufferGuard.java:118)", "org.apache.lucene.store.ByteBufferIndexInput$SingleBufferImpl.readByte(ByteBufferIndexInput.java:385)", "org.apache.lucene.util.packed.DirectReader$DirectPackedReader2.get(DirectReader.java:106)", "org.apache.lucene.codecs.lucene70.Lucene70DocValuesProducer$19.ordValue(Lucene70DocValuesProducer.java:865)", "org.apache.lucene.index.SingletonSortedSetDocValues.advanceExact(SingletonSortedSetDocValues.java:83)", "org.elasticsearch.index.fielddata.FieldData$10.advanceExact(FieldData.java:345)", "org.elasticsearch.index.fielddata.ScriptDocValues$BinaryScriptDocValues.setNextDocId(ScriptDocValues.java:685)", "org.elasticsearch.index.fielddata.ScriptDocValues$Strings.setNextDocId(ScriptDocValues.java:720)", "org.elasticsearch.search.lookup.LeafDocLookup.get(LeafDocLookup.java:94)", "org.elasticsearch.search.lookup.LeafDocLookup.get(LeafDocLookup.java:39)", "doc['field1'].empty?doc['field'].value:doc['field1'].value", " ^---- HERE" ], "script": "doc['field1'].empty?doc['field'].value:doc['field1'].value", "lang": "painless" } ], "type": "search_phase_execution_exception", "reason": "all shards failed", "phase": "query", "grouped": true, "failed_shards": [ { "shard": 0, "index": "log-lemon-agw-access-hexi-20220924", "node": "m6KEOrUgTMqRKvNpf1eEWw", "reason": { "type": "script_exception", "reason": "runtime error", "script_stack": [ "java.nio.Buffer.checkIndex(Buffer.java:540)", "java.nio.DirectByteBuffer.get(DirectByteBuffer.java:253)", "org.apache.lucene.store.ByteBufferGuard.getByte(ByteBufferGuard.java:118)", "org.apache.lucene.store.ByteBufferIndexInput$SingleBufferImpl.readByte(ByteBufferIndexInput.java:385)", "org.apache.lucene.util.packed.DirectReader$DirectPackedReader2.get(DirectReader.java:106)", "org.apache.lucene.codecs.lucene70.Lucene70DocValuesProducer$19.ordValue(Lucene70DocValuesProducer.java:865)", "org.apache.lucene.index.SingletonSortedSetDocValues.advanceExact(SingletonSortedSetDocValues.java:83)", "org.elasticsearch.index.fielddata.FieldData$10.advanceExact(FieldData.java:345)", "org.elasticsearch.index.fielddata.ScriptDocValues$BinaryScriptDocValues.setNextDocId(ScriptDocValues.java:685)", "org.elasticsearch.index.fielddata.ScriptDocValues$Strings.setNextDocId(ScriptDocValues.java:720)", "org.elasticsearch.search.lookup.LeafDocLookup.get(LeafDocLookup.java:94)", "org.elasticsearch.search.lookup.LeafDocLookup.get(LeafDocLookup.java:39)", "doc['field1'].empty?doc['field'].value:doc['field1'].value", " ^---- HERE" ], "script": "doc['field1'].empty?doc['field'].value:doc['field1'].value", "lang": "painless", "caused_by": { "type": "index_out_of_bounds_exception", "reason": null } } } ] }, "status": 500 }