Failed to connect to localhost/0:0:0:0:0:0:0:1:8545 when running the class org.web3j.examples.rx.Main

[bitsabhi]

No description provided.

[bitsabhi]

Logs....

Caused by: java.net.ConnectException: Failed to connect to localhost/0:0:0:0:0:0:0:1:8545
at okhttp3.internal.connection.RealConnection.connectSocket(RealConnection.java:225)
at okhttp3.internal.connection.RealConnection.connect(RealConnection.java:149)
at okhttp3.internal.connection.StreamAllocation.findConnection(StreamAllocation.java:195)
at okhttp3.internal.connection.StreamAllocation.findHealthyConnection(StreamAllocation.java:121)
at okhttp3.internal.connection.StreamAllocation.newStream(StreamAllocation.java:100)
at okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.java:42)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67)
at okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.java:93)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67)
at okhttp3.internal.http.BridgeInterceptor.intercept(BridgeInterceptor.java:93)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
at okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.java:120)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67)
at okhttp3.RealCall.getResponseWithInterceptorChain(RealCall.java:185)
at okhttp3.RealCall.execute(RealCall.java:69)
at org.web3j.protocol.http.HttpService.performIO(HttpService.java:104)
at org.web3j.protocol.Service.send(Service.java:31)
at org.web3j.protocol.core.Request.send(Request.java:71)
at org.web3j.protocol.core.filters.BlockFilter.sendRequest(BlockFilter.java:24)
at org.web3j.protocol.core.filters.Filter.run(Filter.java:45)
... 13 more
Caused by: java.net.ConnectException: Connection refused: connect
at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at okhttp3.internal.platform.Platform.connectSocket(Platform.java:124)
at okhttp3.internal.connection.RealConnection.connectSocket(RealConnection.java:223)
... 35 more

[MuratDoner-zz]

Use this to start over localhost and will work:
geth --rpc --rpcaddr "127.0.0.1" --rpcport "8545"

You are currently using IPC as far I see.

[SnuK87]

I had the same problem when running the node via mist.

Starting it via geth --rpc --rpcaddr "127.0.0.1" --rpcport "8545" solved the problem.

[PolyRibina]

The latest versions of Geth (after 1.10.8-stable) do not support --rpc but fortunately, as you can see in the Command-line Options, it has been replaced by the --http option. So your command should look like this:

geth --http --http.addr "127.0.0.1" --http.port "8545"

This solved my problem.