Error when starting intellij idea, how to fix?

Question

IntelliJ IDEA

internal error. Please refer to https://jb.gg/ide/critical-startup-errors

java.util.concurrent.CompletionException: java.lang.IllegalStateException: failed to create a child event loop
at java.base/java.util.concurrent. CompletableFuture.encodeThrowable(CompletableFuture.java:314)
at java.base/java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:319)
at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture. java:1702)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:668)
at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:665)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1.run(Executors.java:665)
at java.base/java.lang.Thread .run(Thread.java:834)
Caused by: java.lang.IllegalStateException: failed to create a child event loop
at io.netty.util.concurrent.MultithreadEventExecutorGroup.(MultithreadEventExecutorGroup.java:88)
at io.netty.util. concurrent.MultithreadEventExecutorGroup.(MultithreadEventExecutorGroup.java:58)
at io.netty.util.concurrent.MultithreadEventExecutorGroup.(MultithreadEventExecutorGroup.java:47) at
io.netty.channel.MultithreadEventLoopGroup.(MultithreadEventLoopGroup.java:59)
86)
at io.netty.channel.nio.NioEventLoopGroup.(NioEventLoopGroup.java:81)
at io.netty.channel.nio.NioEventLoopGroup.(NioEventLoopGroup.java:68)
at org.jetbrains.io.BuiltInServerKt.multiThreadEventLoopGroup(BuiltInServer .kt:144)
at org.jetbrains.io.BuiltInServerKt.access$multiThreadEventLoopGroup(BuiltInServer.kt:1)
at org.jetbrains.io.BuiltInServer$Companion.start(BuiltInServer.kt:54)
at org.jetbrains.io. BuiltInServer.start(BuiltInServer.kt)
at com.intellij.idea.SocketLock.lambda$lockAndTryActivate$2(SocketLock.java:171)
at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1700)
... 7 more
Caused by : io.netty.channel.ChannelException: failed to open a new selector
at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:175)
at io.netty.channel.nio.NioEventLoop.(NioEventLoop.java: 142)
at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:146)
at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:37)
at io.netty.util.concurrent.MultithreadEventExecutorGroup .(MultithreadEventExecutorGroup.java:84)
... 19 more
Caused by: java.io.IOException: Unable to establish loopback connection
at java.base/sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:94)
at java.base/sun.nio.ch.PipeImpl$ Initializer.run(PipeImpl.java:61)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at java.base/sun.nio.ch.PipeImpl.(PipeImpl.java:171)
at java.base /sun.nio.ch.SelectorProviderImpl.openPipe(SelectorProviderImpl.java:50)
at java.base/java.nio.channels.Pipe.open(Pipe.java:155)
at java.base/sun.nio.ch.WindowsSelectorImpl .(WindowsSelectorImpl.java:142)
at java.base/sun.nio.ch.WindowsSelectorProvider.openSelector(WindowsSelectorProvider.java:44)
at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:173)
... 23 more
Caused by: java.net.ConnectException: Connection refused: connect
at java.base/sun.nio.ch.Net. connect0(Native Method)
at java.base/sun.nio.ch.Net.connect(Net.java:476)
at java.base/sun.nio.ch.Net.connect(Net.java:468)
at java. base/sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:694)
at java.base/java.nio.channels.SocketChannel.open(SocketChannel.java:194)
at java.base/sun.nio.ch. PipeImpl$Initializer$LoopbackConnector.run(PipeImpl.java:127)
at java.base/sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:76)
... 31 more

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Your JRE: 11.0.9.1+11-b1145.77 amd64 (JetBrains sro)
C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2020.3.2\jbr
UPD: the problem was in tor

Answer 1

It looks like IDEA can't connect to somewhere. Probably to the licensing server.