Kotlin 异常没有被捕获？

Question

I'm wondering why with the following code the exception doesn't get caught:

private inline fun <reified T : Any> parseResponse(
        httpConnection: HttpURLConnection,
        noinline callback: ResponseBlock<T>?
    ) {
        with(httpConnection) {
            var error: Throwable? = null
            val model = try {
                if (this.responseCode in 200..299) {
                    jacksonObjectMapper().readValue(
                        this.inputStream.bufferedReader().readText(),
                        T::class.java
                    )
                } else {
                    null
                }
            } catch (e: Exception) {
                error = e
                null
            }

            if (model == null && error == null) {
                error = try {
                    if (this.responseCode !in 200..299) {
                        val errorResponse = this.errorStream.bufferedReader().readText()
                        Throwable(errorResponse)
                    } else {
                        null
                    }
                } catch (e: Exception) {
                    e
                }
            }
            error?.let {
                Log.e(this::class.simpleName, it.message, it)
            }
            callback?.invoke(this.responseCode, model, error)
            this.disconnect()
        }
    }

The function gets called like this:

private inline fun <reified T : Any> get(
        pathComponents: Array<String>,
        noinline callback: ResponseBlock<T>?,
        queryParameters: Map<String, Any>? = null
    ) {
        thread(start = true) {
            val urlRequest = createUrlRequest(HttpMethod.GET, pathComponents, queryParameters)
            parseResponse(urlRequest, callback)
        }
    }

And still I get this exception which causes the app to crash:

E/HttpURLConnectionImpl: Failed to connect to /10.0.2.2:8080
    java.net.ConnectException: Failed to connect to /10.0.2.2:8080
        at com.android.okhttp.internal.io.RealConnection.connectSocket(RealConnection.java:147)
        at com.android.okhttp.internal.io.RealConnection.connect(RealConnection.java:116)
        at com.android.okhttp.internal.http.StreamAllocation.findConnection(StreamAllocation.java:186)
        at com.android.okhttp.internal.http.StreamAllocation.findHealthyConnection(StreamAllocation.java:128)
        at com.android.okhttp.internal.http.StreamAllocation.newStream(StreamAllocation.java:97)
        at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:289)
        at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:232)
        at com.android.okhttp.internal.huc.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:465)
        at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:411)
        at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getResponseCode(HttpURLConnectionImpl.java:542)
        at io.openremote.app.network.ApiManager$getAppConfig$$inlined$get$1.invoke(ApiManager.kt:148)
        at io.openremote.app.network.ApiManager$getAppConfig$$inlined$get$1.invoke(ApiManager.kt:14)
        at kotlin.concurrent.ThreadsKt$thread$thread$1.run(Thread.kt:30)
E/AndroidRuntime: FATAL EXCEPTION: Thread-2
    Process: io.openremote.app, PID: 3901
    java.net.ConnectException: Failed to connect to /10.0.2.2:8080
        at com.android.okhttp.internal.io.RealConnection.connectSocket(RealConnection.java:147)
        at com.android.okhttp.internal.io.RealConnection.connect(RealConnection.java:116)
        at com.android.okhttp.internal.http.StreamAllocation.findConnection(StreamAllocation.java:186)
        at com.android.okhttp.internal.http.StreamAllocation.findHealthyConnection(StreamAllocation.java:128)
        at com.android.okhttp.internal.http.StreamAllocation.newStream(StreamAllocation.java:97)
        at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:289)
        at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:232)
        at com.android.okhttp.internal.huc.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:465)
        at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:411)
        at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getResponseCode(HttpURLConnectionImpl.java:542)
        at io.openremote.app.network.ApiManager$getAppConfig$$inlined$get$1.invoke(ApiManager.kt:148)
        at io.openremote.app.network.ApiManager$getAppConfig$$inlined$get$1.invoke(ApiManager.kt:14)
        at kotlin.concurrent.ThreadsKt$thread$thread$1.run(Thread.kt:30)

I would say the try/catch blocks would catch the exception, but alas...

What causes the exception not being caught? I would say threading doesn't matter because I use try/catch blocks to handle exceptions in the thread.

Update

After Laalto's answer, I've updated the code to look like this (for those who are interested):

private inline fun <reified T : Any> parseResponse(
        httpConnection: HttpURLConnection,
        noinline callback: ResponseBlock<T>?
    ) {
        with(httpConnection) {
            val parsedResult = try {
                if (this.responseCode in 200..299) {
                    Triple(
                        this.responseCode, jacksonObjectMapper().readValue(
                            this.inputStream.bufferedReader().readText(),
                            T::class.java
                        ), null
                    )
                } else {
                    val errorResponse = this.errorStream.bufferedReader().readText()
                    Triple(this.responseCode, null, Throwable(errorResponse))
                }
            } catch (e: Exception) {
                Triple(0, null, e)
            }

            parsedResult.third?.let {
                Log.e(this::class.simpleName, it.message, it)
            }
            callback?.invoke(parsedResult.first, parsedResult.second, parsedResult.third)
            this.disconnect()
        }
    }

Answer 1

The stacktrace shows an exception trying to call getResponseCode() . There's one access to responseCode without a try - catch block at the end:

callback?.invoke(this.responseCode, model, error)

Earlier catch blocks work just fine but the code goes on to execute this part that then throws an exception.

As in your updated question, you have already restructured the code around this issue.