I have created an applet for recording sound. It throws an exception when I try to open a dataline.
TargetDataLine.open()
java.security.AccessControlException: access denied (javax.sound.sampled.AudioPermission record)
My applet is self signed, all other jar files are self signed.
Previously I was using a different thread to start the TargetDataLine and close the line. Afterwords instead of creating another thread, I switched to Executorservice. It works fine with thread but throws above exception with ExecutorService.
Since the executor service starts a new thread when there is call from javascript, the security level of the thread is set to that of javascript thread.
So using AccessControl.doPrivilaged helps to solve the problem.Explained here how to do it.
Related
I'm running a .net Framework ASP.NET WebApi application on Elastic Beanstalk and it occasionally becomes unresponsive.
We've got some process dumps of w3wp.exe and the blocking thread gets stuck on a call to Amazon.Runtime.ClientConfig.get_RetryMode(). This causes a deadlock as it doesn't release a lock obtained in Amazon.Runtime.Internal.Util.Logger.GetLogger. Subsequent calls get blocked in GetLogger() waiting for the lock to be released which never happens.
Any idea why Amazon.Runtime.ClientConfig.get_RetryMode() doesn't return?
Blocking Call Stack
Amazon.Runtime.ClientConfig.get_RetryMode()+2f
Amazon.Runtime.AmazonServiceClient.BuildRuntimePipeline()+1cd
AWS.Logger.Core.AWSLoggerCore..ctor(AWS.Logger.AWSLoggerConfig, System.String)+1b0
AWS.Logger.Log4net.AWSAppender.ActivateOptions()+131
log4net.Repository.Hierarchy.XmlHierarchyConfigurator.ParseAppender(System.Xml.XmlElement)+47b
log4net.Repository.Hierarchy.XmlHierarchyConfigurator.FindAppenderByReference(System.Xml.XmlElement)+1dc
log4net.Repository.Hierarchy.XmlHierarchyConfigurator.ParseChildrenOfLoggerElement(System.Xml.XmlElement, log4net.Repository.Hierarchy.Logger, Boolean)+110
log4net.Repository.Hierarchy.XmlHierarchyConfigurator.ParseRoot(System.Xml.XmlElement)+5f
log4net.Repository.Hierarchy.XmlHierarchyConfigurator.Configure(System.Xml.XmlElement)+554
log4net.Repository.Hierarchy.Hierarchy.XmlRepositoryConfigure(System.Xml.XmlElement)+c9
log4net.Config.XmlConfigurator.InternalConfigure(log4net.Repository.ILoggerRepository, System.IO.Stream)+2ad
log4net.Config.XmlConfigurator.InternalConfigure(log4net.Repository.ILoggerRepository, System.IO.FileInfo)+18f
log4net.Config.XmlConfigurator.Configure(log4net.Repository.ILoggerRepository, System.Uri)+77
log4net.Core.DefaultRepositorySelector.ConfigureRepository(System.Reflection.Assembly, log4net.Repository.ILoggerRepository)+2d1
log4net.Core.DefaultRepositorySelector.CreateRepository(System.Reflection.Assembly, System.Type, System.String, Boolean)+2bf
log4net.Core.DefaultRepositorySelector.GetRepository(System.Reflection.Assembly)+3e
log4net.Core.LoggerManager.GetLogger(System.Reflection.Assembly, System.Type)+45
[[DebuggerU2MCatchHandlerFrame]]
[[HelperMethodFrame_PROTECTOBJ] (System.RuntimeMethodHandle.InvokeMethod)] System.RuntimeMethodHandle.InvokeMethod(System.Object, System.Object[], System.Signature, Boolean)
mscorlib_ni!System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(System.Object, System.Object[], System.Object[])+84
mscorlib_ni!System.Reflection.RuntimeMethodInfo.Invoke(System.Object, System.Reflection.BindingFlags, System.Reflection.Binder, System.Object[], System.Globalization.CultureInfo)+92
Amazon.Runtime.Internal.Util.InternalLog4netLogger..ctor(System.Type)+d8
Amazon.Runtime.Internal.Util.Logger..ctor(System.Type)+5f
Amazon.Runtime.Internal.Util.Logger.GetLogger(System.Type)+af
Amazon.Runtime.AppConfigAWSCredentials..ctor()+33
Amazon.Runtime.FallbackCredentialsFactory+<>c.b__10_0()+1f
Amazon.Runtime.FallbackCredentialsFactory.GetCredentials(Boolean)+c7
Amazon.SimpleSystemsManagement.AmazonSimpleSystemsManagementClient..ctor(Amazon.RegionEndpoint)+3b
// UserCode new Amazon.SimpleSystemsManagement.AmazonSimpleSystemsManagementClient(region)
Blocked Call Stack
System.Threading.Monitor.Enter(System.Object)
Amazon.Runtime.Internal.Util.Logger.GetLogger(System.Type)+68
Amazon.Runtime.AmazonServiceClient..ctor(Amazon.Runtime.AWSCredentials, Amazon.Runtime.ClientConfig)+8d
// UserCode new Amazon.SimpleSystemsManagement.AmazonSimpleSystemsManagementClient(region)
I think the dead lock was caused by fallback process.
Aws Appender
-> obtain Logger
-> Would release Logger after setting up finish
-> setting up is missing some info , call fallback to figure out
-> failed connection, get_RetryMode()
-> trying to obtain Logger (dead lock generated)
I deployed my flutter app to Google play store internal testing and after one hour, I saw this exception in the Pre-launch report details. I am not even sure where to start debugging. Could Someone please help? I don't have a lot of knowledge of Android since I am using Flutter.
Exception java.lang.RuntimeException: Unable to start receiver
com.google.android.finsky.instantapps.PhenotypeUpdateReceiver:
java.lang.IllegalStateException: Not allowed to start service Intent {
act=com.google.android.gms.phenotype.UPDATE
cmp=com.android.vending/com.google.android.finsky.instantapps.PhenotypeUpdateService
}: app is in background uid UidRecord{2a75503 u0a192 TRNB
bg:+2m53s648ms idle change:uncached procs:4 seq(0,0,0)} at
android.app.ActivityThread.handleReceiver (ActivityThread.java:4035)
at android.app.ActivityThread.access$1400 (ActivityThread.java:237)
at android.app.ActivityThread$H.handleMessage
(ActivityThread.java:1924) at android.os.Handler.dispatchMessage
(Handler.java:106) at android.os.Looper.loop (Looper.java:223) at
android.app.ActivityThread.main (ActivityThread.java:7664) at
java.lang.reflect.Method.invoke (Method.java) at
com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run
(RuntimeInit.java:592) at com.android.internal.os.ZygoteInit.main
(ZygoteInit.java:947) Caused by java.lang.IllegalStateException: Not
allowed to start service Intent {
act=com.google.android.gms.phenotype.UPDATE
cmp=com.android.vending/com.google.android.finsky.instantapps.PhenotypeUpdateService
}: app is in background uid UidRecord{2a75503 u0a192 TRNB
bg:+2m53s648ms idle change:uncached procs:4 seq(0,0,0)} at
android.app.ContextImpl.startServiceCommon (ContextImpl.java:1715)
at android.app.ContextImpl.startService (ContextImpl.java:1670) at
android.content.ContextWrapper.startService (ContextWrapper.java:720)
at alj.a (alj.java:2) at alm.a (alm.java:3) at wnv.a (wnv.java:2)
at
com.google.android.finsky.instantapps.PhenotypeUpdateReceiver.onReceive
(PhenotypeUpdateReceiver.java:6) at
android.app.ActivityThread.handleReceiver (ActivityThread.java:4026)
I also managed to download the full logcat which is very large file. I am not sure how to include the file over here.
flutter downgrade to as much as possible
You have to uninstall and reinstall the app, and also have to clear the data and cache from the Settings page.
Try it.
I have solved the problem this way.
I'm trying to delete a Google Pub Sub subscription in a JVM shutdown hook, but I'm encountering an illegal access error with the Google Pub Sub subscription admin client when the shutdown hook runs. I've tried using both sys.addShutdownHook as well as Runtime.getRuntime().addShutdownHook, but I get the same error either way.
val deleteInstanceCacheSubscriptionThread = new Thread {
override def run: Unit = {
cacheUpdateService. deleteInstanceCacheUpdateSubscription()
}
}
sys.addShutdownHook(deleteInstanceCacheSubscriptionThread.run)
// Runtime.getRuntime().addShutdownHook(deleteInstanceCacheSubscriptionThread)
This is the stack trace:
Exception in thread "shutdownHook1" java.lang.IllegalStateException: Illegal access: this web application instance has been stopped already. Could not load [META-INF/services/com.google.auth.http.HttpTransportFactory]. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.
at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading(WebappClassLoaderBase.java:1385)
at org.apache.catalina.loader.WebappClassLoaderBase.findResources(WebappClassLoaderBase.java:985)
at org.apache.catalina.loader.WebappClassLoaderBase.getResources(WebappClassLoaderBase.java:1086)
at java.util.ServiceLoader$LazyIterator.hasNextService(ServiceLoader.java:348)
at java.util.ServiceLoader$LazyIterator.hasNext(ServiceLoader.java:393)
at java.util.ServiceLoader$1.hasNext(ServiceLoader.java:474)
at com.google.common.collect.Iterators.getNext(Iterators.java:845)
at com.google.common.collect.Iterables.getFirst(Iterables.java:779)
at com.google.auth.oauth2.OAuth2Credentials.getFromServiceLoader(OAuth2Credentials.java:318)
at com.google.auth.oauth2.ServiceAccountCredentials.<init>(ServiceAccountCredentials.java:145)
at com.google.auth.oauth2.ServiceAccountCredentials.createScoped(ServiceAccountCredentials.java:505)
at com.google.api.gax.core.GoogleCredentialsProvider.getCredentials(GoogleCredentialsProvider.java:92)
at com.google.api.gax.rpc.ClientContext.create(ClientContext.java:142)
at com.google.cloud.pubsub.v1.stub.GrpcSubscriberStub.create(GrpcSubscriberStub.java:263)
at com.google.cloud.pubsub.v1.stub.SubscriberStubSettings.createStub(SubscriberStubSettings.java:242)
at com.google.cloud.pubsub.v1.SubscriptionAdminClient.<init>(SubscriptionAdminClient.java:178)
at com.google.cloud.pubsub.v1.SubscriptionAdminClient.create(SubscriptionAdminClient.java:159)
at com.google.cloud.pubsub.v1.SubscriptionAdminClient.create(SubscriptionAdminClient.java:150)
at com.company.pubsub.services.GooglePubSubService.$anonfun$deleteSubscription$2(GooglePubSubService.scala:384)
at com.company.utils.TryWithResources$.withResources(TryWithResources.scala:21)
at com.company.pubsub.services.GooglePubSubService.$anonfun$deleteSubscription$1(GooglePubSubService.scala:384)
at com.company.scalalogging.Logging.time(Logging.scala:43)
at com.company.scalalogging.Logging.time$(Logging.scala:35)
at com.company.pubsub.services.GooglePubSubService.time(GooglePubSubService.scala:30)
at com.company.pubsub.services.GooglePubSubService.deleteSubscription(GooglePubSubService.scala:382)
at com.company.cache.services.CacheUpdateService.deleteInstanceCacheUpdateSubscription(CacheUpdateService.scala:109)
at com.company.cache.services.CacheUpdateHandlerService$$anon$1.run(CacheUpdateHandlerService.scala:132)
at com.company.cache.services.CacheUpdateHandlerService$.$anonfun$addSubscriptionShutdownHook$1(CacheUpdateHandlerService.scala:135)
at scala.sys.ShutdownHookThread$$anon$1.run(ShutdownHookThread.scala:37)
It seems like by the time the shutdown hook runs the Pub Sub library has already shut down, so we can't access the subscription admin client anymore. But, I was wondering if there was anyway to delete the subscription before this happens.
I am trying to use ChronicleMap for my index structure, this seems to work fine on Linux but when I am running my JUnit test on Windows (which is my development environment), I keep getting an error: java.io.IOException: Unable to wait until the file is ready, likely the process which created the file crashed or hung for more than 1 minute.
Here's the code snippet that is problematic:
File file = new File(idxFullPath);
ChronicleMap<Integer, int[]> idx =
ChronicleMapBuilder.of(Integer.class, int[].class)
.averageValue(getSampleIdxList())
.entries(IDX_MAX_SIZE)
.createPersistedTo(file);
The following exception is thrown:
[2016-06-17 14:32:47.779] ERROR main com.mcm.op.persistence.Persistence ERR java.io.IOException: Unable to wait until the file is ready, likely the process which created the file crashed or hung for more than 1 minute
at net.openhft.chronicle.map.ChronicleMapBuilder.waitUntilReady(ChronicleMapBuilder.java:1520)
at net.openhft.chronicle.map.ChronicleMapBuilder.openWithExistingFile(ChronicleMapBuilder.java:1583)
at net.openhft.chronicle.map.ChronicleMapBuilder.createWithFile(ChronicleMapBuilder.java:1444)
at net.openhft.chronicle.map.ChronicleMapBuilder.createPersistedTo(ChronicleMapBuilder.java:1405)
at com.mcm.op.persistence.Persistence.initIdx(Persistence.java:131)
at com.mcm.op.persistence.Persistence.init(Persistence.java:177)
at com.mcm.op.persistence.PersistenceTest.initPersist(PersistenceTest.java:47)
at com.mcm.op.persistence.PersistenceTest.setUp(PersistenceTest.java:29)
Indeed, it is likely that the process which created the file has crashed, or stopped terminated debugging, or something like that.
If it's ok to have a fresh index from unit test-to-test runs, I recommend to try either delete the file at idxFullPath before creating a Chronicle Map, or randomize the mapping file via something like File.createTempFile(). In either case File.deleteOnExit() could appear to be helpful.
If you want to keep the index between unit test runs and always use the same file at idxFullPath for persistence, you could try to use builder.createOrRecoverPersistedTo() instead of plain createPersistedTo() map creation method. However this might slow down the map creation.
My current project includes using of a JavaMail for confirming an user email. The problem I have is that, using eclipse, every time I build & deploy my web application on the local Glassfish server the JavaMail crashes with the following exception:
Severe: java.lang.SecurityException: Access to default session denied
at javax.mail.Session.getDefaultInstance(Session.java:333)
at utils.MailService.sendEmailSSL(MailService.java:58)
And here the code snipped where I'm obtaining the session and which is throwing the above exception:
Session session = Session.getDefaultInstance(
props,
new javax.mail.Authenticator(){
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(usr, pwd);
}
});
The workaround I've found so far is restarting Glassfish and after that JavaMail functions properly again. The problem is it is very annoying and time consuming doing a restart even after the smallest change in my code.
My question: Is there a possibility to reset only the JavaMail service and bind this with the build event?
Off course any other suggestions are welcome too :)
If you can avoid using Session.getDefaultInstance. Use Session.getInstance and fix some of the common mistakes.