# Class cast exception while updating documents **URL:** \ **Category:** Elasticsearch\ **Created:** [December 19, 2018, 6:12am UTC](https://discuss.elastic.co/t/class-cast-exception-while-updating-documents/161448 "2018-12-19T06:12:19Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![BlueSpirit](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/bluespirit/32/44056_2.png) [@BlueSpirit](https://discuss.elastic.co/u/BlueSpirit)\ **Post date:** [December 19, 2018, 6:12am UTC](https://discuss.elastic.co/t/class-cast-exception-while-updating-documents/161448/1 "2018-12-19T06:12:19Z")
While updating all documents in an index using _\_update\_by\_query_ I get the following error: > { > "error": { > "root\_cause": [ > { > "type": "class\_cast\_exception", > "reason": "java.lang.String incompatible with java.util.Map" > } > ], > "type": "class\_cast\_exception", > "reason": "java.lang.String incompatible with java.util.Map" > }, > "status": 500 > } Query executed was: ``` POST raw_requests_bib/_update_by_query { "query": { "filtered": { "filter": { "bool": { "must": [ { "term": { "user": "ba1" } } ] } } } }, "script" : "ctx._source.user = BA1;" } ``` My documents look like this: { "time": "12-12-2018--09-12-38", "user": "ba1", "url": "/page1" } Executed this on kibana devtools page. I do not have access to elasticsearch logs for this. Any leads would be helpful. ---
**Author:** ![rjernst](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/rjernst/32/6363_2.png) [@rjernst](https://discuss.elastic.co/u/rjernst)\ **Post date:** [December 20, 2018, 8:15pm UTC](https://discuss.elastic.co/t/class-cast-exception-while-updating-documents/161448/2 "2018-12-20T20:15:56Z")
Without logs it will be difficult to investigate. We need the full stacktrace (which is printed in the log). However, at a glance, what is `BA1`? If you mean this to be a string literal, it needs to be in quotes: ```auto "script" : "ctx._source.user = 'BA1';" ``` ---
**Author:** ![BlueSpirit](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/bluespirit/32/44056_2.png) [@BlueSpirit](https://discuss.elastic.co/u/BlueSpirit)\ **Post date:** [December 26, 2018, 9:56am UTC](https://discuss.elastic.co/t/class-cast-exception-while-updating-documents/161448/3 "2018-12-26T09:56:45Z")
Sorry for the late reply. I was able to get the logs from the server. > [2018-12-26T15:23:39,068][WARN][r.suppressed] path: /raw\_requests\_bib/\_update\_by\_query, params: {index=raw\_requests\_bib} > java.lang.ClassCastException: java.lang.String incompatible with java.util.Map > at org.elasticsearch.index.reindex.RestUpdateByQueryAction.lambda$buildRequest$1(RestUpdateByQueryAction.java:65) ~[?:?] > at org.elasticsearch.index.reindex.RestUpdateByQueryAction$$Lambda$2051.000000002FC44C90.accept(Unknown Source) ~[?:?] > at org.elasticsearch.index.reindex.AbstractBulkByQueryRestHandler.extractRequestSpecificFields(AbstractBulkByQueryRestHandler.java:94) ~[?:?] > at org.elasticsearch.index.reindex.AbstractBulkByQueryRestHandler.parseInternalRequest(AbstractBulkByQueryRestHandler.java:57) ~[?:?] > at org.elasticsearch.index.reindex.RestUpdateByQueryAction.buildRequest(RestUpdateByQueryAction.java:67) ~[?:?] > at org.elasticsearch.index.reindex.RestUpdateByQueryAction.buildRequest(RestUpdateByQueryAction.java:41) ~[?:?] > at org.elasticsearch.index.reindex.AbstractBaseReindexRestHandler.doPrepareRequest(AbstractBaseReindexRestHandler.java:54) ~[?:?] > at org.elasticsearch.index.reindex.RestUpdateByQueryAction.prepareRequest(RestUpdateByQueryAction.java:50) ~[?:?] > at org.elasticsearch.rest.BaseRestHandler.handleRequest(BaseRestHandler.java:64) ~[elasticsearch-5.6.7.jar:5.6.7] > at org.elasticsearch.rest.RestController.dispatchRequest(RestController.java:262) ~[elasticsearch-5.6.7.jar:5.6.7] > at org.elasticsearch.rest.RestController.dispatchRequest(RestController.java:200) [elasticsearch-5.6.7.jar:5.6.7] > at org.elasticsearch.http.netty4.Netty4HttpServerTransport.dispatchRequest(Netty4HttpServerTransport.java:505) [transport-netty4-5.6.7.jar:5.6.7] > at org.elasticsearch.http.netty4.Netty4HttpRequestHandler.channelRead0(Netty4HttpRequestHandler.java:80) [transport-netty4-5.6.7.jar:5.6.7] > at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105) [netty-transport-4.1.13.Final.jar:4.1.13.Final] > at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [netty-transport-4.1.13.Final.jar:4.1.13.Final] > at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [netty-transport-4.1.13.Final.jar:4.1.13.Final] > at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) [netty-transport-4.1.13.Final.jar:4.1.13.Final] > at org.elasticsearch.http.netty4.pipelining.HttpPipeliningHandler.channelRead(HttpPipeliningHandler.java:68) [transport-netty4-5.6.7.jar:5.6.7] > at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [netty-transport-4.1.13.Final.jar:4.1.13.Final] > at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [netty-transport-4.1.13.Final.jar:4.1.13.Final] > at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) [netty-transport-4.1.13.Final.jar:4.1.13.Final] > at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:102) [netty-codec-4.1.13.Final.jar:4.1.13.Final] > at io.netty.handler.codec.MessageToMessageCodec.channelRead(MessageToMessageCodec.java:111) [netty-codec-4.1.13.Final.jar:4.1.13.Final] > .... > at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) [netty-transport-4.1.13.Final.jar:4.1.13.Final] > at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1334) [netty-transport-4.1.13.Final.jar:4.1.13.Final] > at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [netty-transport-4.1.13.Final.jar:4.1.13.Final] > at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [netty-transport-4.1.13.Final.jar:4.1.13.Final] > at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:926) [netty-transport-4.1.13.Final.jar:4.1.13.Final] > at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:134) [netty-transport-4.1.13.Final.jar:4.1.13.Final] > at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:644) [netty-transport-4.1.13.Final.jar:4.1.13.Final] > at io.netty.channel.nio.NioEventLoop.processSelectedKeysPlain(NioEventLoop.java:544) [netty-transport-4.1.13.Final.jar:4.1.13.Final] > at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:498) [netty-transport-4.1.13.Final.jar:4.1.13.Final] > at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:458) [netty-transport-4.1.13.Final.jar:4.1.13.Final] > at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:858) [netty-common-4.1.13.Final.jar:4.1.13.Final] > at java.lang.Thread.run(Thread.java:785) [?:1.8.0-internal] Please let me know if this could be helped. Also, tried `"script" : "ctx._source.user = 'BA1';"` but that did not help. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [January 23, 2019, 9:56am UTC](https://discuss.elastic.co/t/class-cast-exception-while-updating-documents/161448/4 "2019-01-23T09:56:49Z")
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