Strict mode DiskReadViolation while initializing HttpClient

[insearching]

Hi all,
I'm facing a disk read violation while initializing my HttpClient with Koin DI.

Here is how I initialize the HttpClient:
val remoteModule = module { single { HttpClientFactory.create(CIO.create()) } }

Here is the configuration of StrictMode:

StrictMode.setThreadPolicy( ThreadPolicy.Builder() .detectDiskReads() .detectDiskWrites() .detectNetwork() .penaltyLog() .build() )

And here is a stack of a StrinctMode itself:

StrictMode policy violation; ~duration=227 ms: android.os.strictmode.DiskReadViolation (Ask Gemini) at android.os.StrictMode$AndroidBlockGuardPolicy.onReadFromDisk(StrictMode.java:1728) at java.io.UnixFileSystem.getBooleanAttributes(UnixFileSystem.java:301) at java.io.File.isDirectory(File.java:859) at dalvik.system.DexPathList$Element.findResource(DexPathList.java:788) at dalvik.system.DexPathList.findResources(DexPathList.java:572) at dalvik.system.BaseDexClassLoader.findResources(BaseDexClassLoader.java:330) at java.lang.ClassLoader.getResources(ClassLoader.java:1450) at java.util.ServiceLoader$LazyClassPathLookupIterator.nextProviderClass(ServiceLoader.java:1157) at java.util.ServiceLoader$LazyClassPathLookupIterator.hasNextService(ServiceLoader.java:1184) at java.util.ServiceLoader$LazyClassPathLookupIterator.hasNext(ServiceLoader.java:1238) at java.util.ServiceLoader$2.hasNext(ServiceLoader.java:1367) at java.nio.channels.spi.SelectorProvider.loadProviderAsService(SelectorProvider.java:122) at java.nio.channels.spi.SelectorProvider.-$$Nest$smloadProviderAsService(Unknown Source:0) at java.nio.channels.spi.SelectorProvider$1.run(SelectorProvider.java:180) at java.nio.channels.spi.SelectorProvider$1.run(SelectorProvider.java:176) at java.security.AccessController.doPrivileged(AccessController.java:46) at java.nio.channels.spi.SelectorProvider.provider(SelectorProvider.java:175) at io.ktor.network.selector.SelectorManagerSupport.<init>(SelectorManagerSupport.kt:18) at io.ktor.network.selector.ActorSelectorManager.<init>(ActorSelectorManager.kt:18) at io.ktor.network.selector.SelectorManagerKt.SelectorManager(SelectorManager.kt:13) at io.ktor.client.engine.cio.CIOEngine.<init>(CIOEngine.kt:32) at io.ktor.client.engine.cio.CIO.create(CIOCommon.kt:34) at io.ktor.client.engine.HttpClientEngineFactory$DefaultImpls.create$default(HttpClientEngine.kt:118) at kma.voice.text.recorder.di.RemoteModuleKt.remoteModule$lambda$1$lambda$0(RemoteModule.kt:12) at kma.voice.text.recorder.di.RemoteModuleKt.$r8$lambda$wr-v9Z4C-b0NtNszDlru3pGEF6g(Unknown Source:0) at kma.voice.text.recorder.di.RemoteModuleKt$$ExternalSyntheticLambda0.invoke(D8$$SyntheticClass:0) at org.koin.core.instance.InstanceFactory.create(InstanceFactory.kt:51) at org.koin.core.instance.SingleInstanceFactory.create(SingleInstanceFactory.kt:46) at org.koin.core.instance.SingleInstanceFactory.get$lambda$0(SingleInstanceFactory.kt:55) at org.koin.core.instance.SingleInstanceFactory.$r8$lambda$DuRNwghYWsMwMsdJERKYXVNSM_0(Unknown Source:0) at org.koin.core.instance.SingleInstanceFactory$$ExternalSyntheticLambda0.invoke(D8$$SyntheticClass:0) at org.koin.mp.KoinPlatformTools.synchronized(KoinPlatformTools.kt:36) at org.koin.core.instance.SingleInstanceFactory.get(SingleInstanceFactory.kt:53) at org.koin.core.registry.InstanceRegistry.resolveInstance$koin_core(InstanceRegistry.kt:110) at org.koin.core.scope.Scope.resolveFromRegistry(Scope.kt:321) at org.koin.core.scope.Scope.resolveFromContext(Scope.kt:311) at org.koin.core.scope.Scope.stackParametersCall(Scope.kt:273) at org.koin.core.scope.Scope.resolveInstance(Scope.kt:259) at org.koin.core.scope.Scope.resolveWithOptionalLogging(Scope.kt:232) at org.koin.core.scope.Scope.get(Scope.kt:215) at kma.voice.text.recorder.di.RemoteModuleKt$remoteModule$lambda$1$$inlined$singleOf$default$1.invoke(SingleOf.kt:227) at kma.voice.text.recorder.di.RemoteModuleKt$remoteModule$lambda$1$$inlined$singleOf$default$1.invoke(SingleOf.kt:52) at org.koin.core.instance.InstanceFactory.create(InstanceFactory.kt:51) at org.koin.core.instance.SingleInstanceFactory.create(SingleInstanceFactory.kt:46) at org.koin.core.instance.SingleInstanceFactory.get$lambda$0(SingleInstanceFactory.kt:55) at org.koin.core.instance.SingleInstanceFactory.$r8$lambda$DuRNwghYWsMwMsdJERKYXVNSM_0(Unknown Source:0) at org.koin.core.instance.SingleInstanceFactory$$ExternalSyntheticLambda0.invoke(D8$$SyntheticClass:0) 2025-04-29 16:56:04.094 20596-20596 StrictMode kma.voice.text.recorder D at org.koin.mp.KoinPlatformTools.synchronized(KoinPlatformTools.kt:36) (Ask Gemini) at org.koin.core.instance.SingleInstanceFactory.get(SingleInstanceFactory.kt:53) at org.koin.core.registry.InstanceRegistry.resolveInstance$koin_core(InstanceRegistry.kt:110) at org.koin.core.scope.Scope.resolveFromRegistry(Scope.kt:321) at org.koin.core.scope.Scope.resolveFromContext(Scope.kt:311) at org.koin.core.scope.Scope.stackParametersCall(Scope.kt:273) at org.koin.core.scope.Scope.resolveInstance(Scope.kt:259) at org.koin.core.scope.Scope.resolveWithOptionalLogging(Scope.kt:232) at org.koin.core.scope.Scope.get(Scope.kt:215) at kma.voice.text.recorder.di.AppModuleKt$appModule$lambda$18$$inlined$singleOf$1.invoke(SingleOf.kt:227) at kma.voice.text.recorder.di.AppModuleKt$appModule$lambda$18$$inlined$singleOf$1.invoke(SingleOf.kt:76) at org.koin.core.instance.InstanceFactory.create(InstanceFactory.kt:51) at org.koin.core.instance.SingleInstanceFactory.create(SingleInstanceFactory.kt:46) at org.koin.core.instance.SingleInstanceFactory.get$lambda$0(SingleInstanceFactory.kt:55) at org.koin.core.instance.SingleInstanceFactory.$r8$lambda$DuRNwghYWsMwMsdJERKYXVNSM_0(Unknown Source:0) at org.koin.core.instance.SingleInstanceFactory$$ExternalSyntheticLambda0.invoke(D8$$SyntheticClass:0) at org.koin.mp.KoinPlatformTools.synchronized(KoinPlatformTools.kt:36) at org.koin.core.instance.SingleInstanceFactory.get(SingleInstanceFactory.kt:53) at org.koin.core.registry.InstanceRegistry.resolveInstance$koin_core(InstanceRegistry.kt:110) at org.koin.core.scope.Scope.resolveFromRegistry(Scope.kt:321) at org.koin.core.scope.Scope.resolveFromContext(Scope.kt:311) at org.koin.core.scope.Scope.stackParametersCall(Scope.kt:273) at org.koin.core.scope.Scope.resolveInstance(Scope.kt:259) at org.koin.core.scope.Scope.resolveWithOptionalLogging(Scope.kt:232) at org.koin.core.scope.Scope.get(Scope.kt:215) at kma.voice.text.recorder.di.AppModuleKt$appModule$lambda$18$$inlined$viewModelOf$default$2.invoke(ViewModelOf.kt:226) at kma.voice.text.recorder.di.AppModuleKt$appModule$lambda$18$$inlined$viewModelOf$default$2.invoke(ViewModelOf.kt:67) at org.koin.core.instance.InstanceFactory.create(InstanceFactory.kt:51) at org.koin.core.instance.FactoryInstanceFactory.get(FactoryInstanceFactory.kt:38) at org.koin.core.registry.InstanceRegistry.resolveInstance$koin_core(InstanceRegistry.kt:110) at org.koin.core.scope.Scope.resolveFromRegistry(Scope.kt:321) at org.koin.core.scope.Scope.resolveFromContext(Scope.kt:311) at org.koin.core.scope.Scope.stackParametersCall(Scope.kt:281) at org.koin.core.scope.Scope.resolveInstance(Scope.kt:259) at org.koin.core.scope.Scope.resolveWithOptionalLogging(Scope.kt:232) at org.koin.core.scope.Scope.get(Scope.kt:215) at org.koin.viewmodel.factory.KoinViewModelFactory.create(KoinViewModelFactory.kt:39) at androidx.lifecycle.viewmodel.ViewModelProviderImpl_androidKt.createViewModel(ViewModelProviderImpl.android.kt:34) at androidx.lifecycle.viewmodel.ViewModelProviderImpl.getViewModel$lifecycle_viewmodel_release(ViewModelProviderImpl.kt:65) at androidx.lifecycle.viewmodel.ViewModelProviderImpl.getViewModel$lifecycle_viewmodel_release$default(ViewModelProviderImpl.kt:47) at androidx.lifecycle.ViewModelProvider.get(ViewModelProvider.android.kt:91) at org.koin.viewmodel.GetViewModelKt.resolveViewModel(GetViewModel.kt:60) at kma.voice.text.recorder.presentation.record_list.RecordListScreenKt.RecordListScreenRoot(RecordListScreen.kt:463) at kma.voice.text.recorder.ComposableSingletons$MainActivityKt$lambda-1$1$2$1$1$1.invoke(MainActivity.kt:107) at kma.voice.text.recorder.ComposableSingletons$MainActivityKt$lambda-1$1$2$1$1$1.invoke(MainActivity.kt:106) at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:139) at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:35) at androidx.navigation.compose.NavHostKt$NavHost$32$1.invoke(NavHost.kt:704) 2025-04-29 16:56:04.094 20596-20596 StrictMode kma.voice.text.recorder D at androidx.navigation.compose.NavHostKt$NavHost$32$1.invoke(NavHost.kt:703) (Ask Gemini) at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:109) at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:35) at androidx.compose.runtime.CompositionLocalKt.CompositionLocalProvider(CompositionLocal.kt:401) at androidx.compose.runtime.saveable.SaveableStateHolderImpl.SaveableStateProvider(SaveableStateHolder.kt:85) at androidx.navigation.compose.NavBackStackEntryProviderKt.SaveableStateProvider(NavBackStackEntryProvider.kt:65) at androidx.navigation.compose.NavBackStackEntryProviderKt.access$SaveableStateProvider(NavBackStackEntryProvider.kt:1) at androidx.navigation.compose.NavBackStackEntryProviderKt$LocalOwnersProvider$1.invoke(NavBackStackEntryProvider.kt:52) at androidx.navigation.compose.NavBackStackEntryProviderKt$LocalOwnersProvider$1.invoke(NavBackStackEntryProvider.kt:51) at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:109) at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:35) at androidx.compose.runtime.CompositionLocalKt.CompositionLocalProvider(CompositionLocal.kt:380) at androidx.navigation.compose.NavBackStackEntryProviderKt.LocalOwnersProvider(NavBackStackEntryProvider.kt:47) at androidx.navigation.compose.NavHostKt$NavHost$32.invoke(NavHost.kt:703) at androidx.navigation.compose.NavHostKt$NavHost$32.invoke(NavHost.kt:683) at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:139) at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:35) at androidx.compose.animation.AnimatedContentKt$AnimatedContent$6$1$5.invoke(AnimatedContent.kt:803) at androidx.compose.animation.AnimatedContentKt$AnimatedContent$6$1$5.invoke(AnimatedContent.kt:792) at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:118) at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:35) at androidx.compose.animation.AnimatedVisibilityKt.AnimatedEnterExitImpl(AnimatedVisibility.kt:771) at androidx.compose.animation.AnimatedContentKt$AnimatedContent$6$1.invoke(AnimatedContent.kt:774) at androidx.compose.animation.AnimatedContentKt$AnimatedContent$6$1.invoke(AnimatedContent.kt:757) at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:109) at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:35) at androidx.compose.animation.AnimatedContentKt.AnimatedContent(AnimatedContent.kt:816) at androidx.navigation.compose.NavHostKt.NavHost(NavHost.kt:655) at androidx.navigation.compose.NavHostKt.NavHost(NavHost.kt:356)

Any ideas why there might be a problem with a disk read violation?

[Stexxe]

It looks like the violation occurs while the SelectorProvider tries to find and load the provider as a service. Can you please try to set the sun.nio.ch.PollSelectorProvider property to load a specific provider?

System.setProperty("java.nio.channels.spi.SelectorProvider", "sun.nio.ch.PollSelectorProvider")

[insearching]

Hello @Stexxe
After applying property stack looks almost the same:

StrictMode policy violation; ~duration=199 ms: android.os.strictmode.DiskReadViolation (Ask Gemini) at android.os.StrictMode$AndroidBlockGuardPolicy.onReadFromDisk(StrictMode.java:1728) at libcore.io.BlockGuardOs.lseek(BlockGuardOs.java:242) at libcore.io.ForwardingOs.lseek(ForwardingOs.java:469) at java.io.RandomAccessFile.seek(RandomAccessFile.java:635) at java.util.zip.ZipFile$Source.readFullyAt(ZipFile.java:1476) at java.util.zip.ZipFile$Source.-$$Nest$mreadFullyAt(Unknown Source:0) at java.util.zip.ZipFile$ZipFileInputStream.initDataOffset(ZipFile.java:979) at java.util.zip.ZipFile$ZipFileInputStream.read(ZipFile.java:995) at java.util.zip.ZipFile$ZipFileInflaterInputStream.fill(ZipFile.java:495) at java.util.zip.InflaterInputStream.read(InflaterInputStream.java:210) at java.io.FilterInputStream.read(FilterInputStream.java:133) at sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:291) at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:355) at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:181) at java.io.InputStreamReader.read(InputStreamReader.java:177) at java.io.BufferedReader.fill(BufferedReader.java:172) at java.io.BufferedReader.readLine(BufferedReader.java:337) at java.io.BufferedReader.readLine(BufferedReader.java:403) at java.util.ServiceLoader$LazyClassPathLookupIterator.parseLine(ServiceLoader.java:1086) at java.util.ServiceLoader$LazyClassPathLookupIterator.parse(ServiceLoader.java:1127) at java.util.ServiceLoader$LazyClassPathLookupIterator.nextProviderClass(ServiceLoader.java:1167) at java.util.ServiceLoader$LazyClassPathLookupIterator.hasNextService(ServiceLoader.java:1184) at java.util.ServiceLoader$LazyClassPathLookupIterator.hasNext(ServiceLoader.java:1238) at java.util.ServiceLoader$2.hasNext(ServiceLoader.java:1367) at kotlin.collections.CollectionsKt___CollectionsKt.toCollection(_Collections.kt:1303) at kotlin.collections.CollectionsKt___CollectionsKt.toMutableList(_Collections.kt:1336) at kotlin.collections.CollectionsKt___CollectionsKt.toList(_Collections.kt:1327) at io.ktor.serialization.kotlinx.ExtensionsJvmKt.<clinit>(ExtensionsJvm.kt:11) at io.ktor.serialization.kotlinx.ExtensionsKt.extensions(Extensions.kt:17) at io.ktor.serialization.kotlinx.KotlinxSerializationConverter.<init>(KotlinxSerializationConverter.kt:29) at io.ktor.serialization.kotlinx.KotlinxSerializationConverterKt.serialization(KotlinxSerializationConverter.kt:118) at io.ktor.serialization.kotlinx.json.JsonSupportKt.json(JsonSupport.kt:58) at io.ktor.serialization.kotlinx.json.JsonSupportKt.json$default(JsonSupport.kt:54) at kma.voice.text.recorder.data.remote.HttpClientFactory.create$lambda$3$lambda$2(HttpClientFactory.kt:39) at kma.voice.text.recorder.data.remote.HttpClientFactory.$r8$lambda$xQnDJ84UVu_tPjWawG0T7Pvoe4w(Unknown Source:0) at kma.voice.text.recorder.data.remote.HttpClientFactory$$ExternalSyntheticLambda1.invoke(D8$$SyntheticClass:0) at io.ktor.client.HttpClientConfig.install$lambda$3(HttpClientConfig.kt:80) at io.ktor.client.HttpClientConfig.$r8$lambda$UP_r6lSd_wdOlSg98DvCyJ72xOE(Unknown Source:0) at io.ktor.client.HttpClientConfig$$ExternalSyntheticLambda0.invoke(D8$$SyntheticClass:0) at io.ktor.client.plugins.api.ClientPluginImpl.prepare(CreatePluginUtils.kt:62) at io.ktor.client.plugins.api.ClientPluginImpl.prepare(CreatePluginUtils.kt:53) at io.ktor.client.HttpClientConfig.install$lambda$5(HttpClientConfig.kt:88) at io.ktor.client.HttpClientConfig.$r8$lambda$Dv3iGRsSjy2IU0e6Y6pINhOKkMo(Unknown Source:0) at io.ktor.client.HttpClientConfig$$ExternalSyntheticLambda1.invoke(D8$$SyntheticClass:0) at io.ktor.client.HttpClientConfig.install(HttpClientConfig.kt:108) at io.ktor.client.HttpClient.<init>(HttpClient.kt:174) at io.ktor.client.HttpClient.<init>(HttpClient.kt:85) at io.ktor.client.HttpClientKt.HttpClient(HttpClient.kt:64) at kma.voice.text.recorder.data.remote.HttpClientFactory.create(HttpClientFactory.kt:17) 2025-05-02 16:14:13.383 25076-25076 StrictMode kma.voice.text.recorder D at kma.voice.text.recorder.di.RemoteModuleKt.remoteModule$lambda$1$lambda$0(RemoteModule.kt:12) (Ask Gemini) at kma.voice.text.recorder.di.RemoteModuleKt.$r8$lambda$wr-v9Z4C-b0NtNszDlru3pGEF6g(Unknown Source:0) at kma.voice.text.recorder.di.RemoteModuleKt$$ExternalSyntheticLambda0.invoke(D8$$SyntheticClass:0) at org.koin.core.instance.InstanceFactory.create(InstanceFactory.kt:51) at org.koin.core.instance.SingleInstanceFactory.create(SingleInstanceFactory.kt:46) at org.koin.core.instance.SingleInstanceFactory.get$lambda$0(SingleInstanceFactory.kt:55) at org.koin.core.instance.SingleInstanceFactory.$r8$lambda$DuRNwghYWsMwMsdJERKYXVNSM_0(Unknown Source:0) at org.koin.core.instance.SingleInstanceFactory$$ExternalSyntheticLambda0.invoke(D8$$SyntheticClass:0) at org.koin.mp.KoinPlatformTools.synchronized(KoinPlatformTools.kt:36) at org.koin.core.instance.SingleInstanceFactory.get(SingleInstanceFactory.kt:53) at org.koin.core.registry.InstanceRegistry.resolveInstance$koin_core(InstanceRegistry.kt:110) at org.koin.core.scope.Scope.resolveFromRegistry(Scope.kt:321) at org.koin.core.scope.Scope.resolveFromContext(Scope.kt:311) at org.koin.core.scope.Scope.stackParametersCall(Scope.kt:273) at org.koin.core.scope.Scope.resolveInstance(Scope.kt:259) at org.koin.core.scope.Scope.resolveWithOptionalLogging(Scope.kt:232) at org.koin.core.scope.Scope.get(Scope.kt:215) at kma.voice.text.recorder.di.RemoteModuleKt$remoteModule$lambda$1$$inlined$singleOf$default$1.invoke(SingleOf.kt:227) at kma.voice.text.recorder.di.RemoteModuleKt$remoteModule$lambda$1$$inlined$singleOf$default$1.invoke(SingleOf.kt:52)

[Stexxe]

Now the problem is that it tries to load the KotlinxSerializationExtensionProvider services from the disk (there is only one such class, KotlinxSerializationJsonExtensionProvider). Is it possible to preload those service classes or put them into the resulting bundle if they are not there to prevent disk reads? Unfortunately, I am not well familiar with the Android environment.

So the root problem is that it tries to load classes from the disk while discovering the services.
Also, you can try keeping the classes mentioned above by configuring ProGuard.