# Unable to create index from c#
**URL:** https://discuss.elastic.co/t/unable-to-create-index-from-c/301655
**Category:** Elasticsearch
**Created:** [April 5, 2022, 5:16pm UTC](https://discuss.elastic.co/t/unable-to-create-index-from-c/301655 "2022-04-05T17:16:47Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@shamir](https://discuss.elastic.co/u/shamir)
#### Post date: [April 5, 2022, 5:16pm UTC](https://discuss.elastic.co/t/unable-to-create-index-from-c/301655/1 "2022-04-05T17:16:47Z")
```auto
io.netty.handler.codec.DecoderException: javax.net.ssl.SSLHandshakeException: Received fatal alert: unknown_ca
at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:480) ~[netty-codec-4.1.73.Final.jar:4.1.73.Final]
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:279) ~[netty-codec-4.1.73.Final.jar:4.1.73.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) [netty-transport-4.1.73.Final.jar:4.1.73.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) [netty-transport-4.1.73.Final.jar:4.1.73.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) [netty-transport-4.1.73.Final.jar:4.1.73.Final]
at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410) [netty-transport-4.1.73.Final.jar:4.1.73.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) [netty-transport-4.1.73.Final.jar:4.1.73.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) [netty-transport-4.1.73.Final.jar:4.1.73.Final]
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919) [netty-transport-4.1.73.Final.jar:4.1.73.Final]
at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166) [netty-transport-4.1.73.Final.jar:4.1.73.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:722) [netty-transport-4.1.73.Final.jar:4.1.73.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeysPlain(NioEventLoop.java:623) [netty-transport-4.1.73.Final.jar:4.1.73.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:586) [netty-transport-4.1.73.Final.jar:4.1.73.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:496) [netty-transport-4.1.73.Final.jar:4.1.73.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:986) [netty-common-4.1.73.Final.jar:4.1.73.Final]
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) [netty-common-4.1.73.Final.jar:4.1.73.Final]
at java.lang.Thread.run(Thread.java:833) [?:?]
Caused by: javax.net.ssl.SSLHandshakeException: Received fatal alert: unknown_ca
at sun.security.ssl.Alert.createSSLException(Alert.java:131) ~[?:?]
at sun.security.ssl.Alert.createSSLException(Alert.java:117) ~[?:?]
at sun.security.ssl.TransportContext.fatal(TransportContext.java:358) ~[?:?]
at sun.security.ssl.Alert$AlertConsumer.consume(Alert.java:293) ~[?:?]
at sun.security.ssl.TransportContext.dispatch(TransportContext.java:204) ~[?:?]
at sun.security.ssl.SSLTransport.decode(SSLTransport.java:172) ~[?:?]
at sun.security.ssl.SSLEngineImpl.decode(SSLEngineImpl.java:736) ~[?:?]
at sun.security.ssl.SSLEngineImpl.readRecord(SSLEngineImpl.java:691) ~[?:?]
at sun.security.ssl.SSLEngineImpl.unwrap(SSLEngineImpl.java:506) ~[?:?]
at sun.security.ssl.SSLEngineImpl.unwrap(SSLEngineImpl.java:482) ~[?:?]
at javax.net.ssl.SSLEngine.unwrap(SSLEngine.java:679) ~[?:?]
at io.netty.handler.ssl.SslHandler$SslEngineType$3.unwrap(SslHandler.java:295) ~[netty-handler-4.1.73.Final.jar:4.1.73.Final]
at io.netty.handler.ssl.SslHandler.unwrap(SslHandler.java:1341) ~[netty-handler-4.1.73.Final.jar:4.1.73.Final]
at io.netty.handler.ssl.SslHandler.decodeJdkCompatible(SslHandler.java:1234) ~[netty-handler-4.1.73.Final.jar:4.1.73.Final]
at io.netty.handler.ssl.SslHandler.decode(SslHandler.java:1283) ~[netty-handler-4.1.73.Final.jar:4.1.73.Final]
at io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:510) ~[netty-codec-4.1.73.Final.jar:4.1.73.Final]
at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:449) ~[netty-codec-4.1.73.Final.jar:4.1.73.Final]
... 16 more
```
---
### Author:  [@warkolm](https://discuss.elastic.co/u/warkolm)
#### Post date: [April 5, 2022, 9:46pm UTC](https://discuss.elastic.co/t/unable-to-create-index-from-c/301655/2 "2022-04-05T21:46:20Z")
Unfortunately posting part of a log, with no other information is unlikely to get you much assistance.
You've given no indication of what the code you have is doing, what version of Elasticsearch you are using, what your Elasticsearch config is, where this error is from.
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [May 3, 2022, 9:46pm UTC](https://discuss.elastic.co/t/unable-to-create-index-from-c/301655/3 "2022-05-03T21:46:29Z")
This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.