Causes of getting a java lang VerifyError

Question

I m investigating the following java lang VerifyError  java lang VerifyError   class  be post ehr wfm application serviceorganization report DisplayReportServlet  method  getMonthData signature   IILjava util Collection Ljava util Collection Ljava util HashMap Ljava util Collection Ljava util Locale Lorg apache struts util MessageRe        Mt    M    w     m    w     mp      M                         at java lang Class getDeclaredConstructors0 Native Method                  at java lang Class privateGetDeclaredConstructors Class java 2357                  at java lang Class getConstructor0 Class java 2671    It occurs when the jboss server in which the servlet is deployed is started  It is compiled with jdk-1 5 0 11 and I tried to recompile it with jdk-1 5 0 15 without succes  That is the compilation runs fine but when deployed  the java lang VerifyError occurs   When I changed the method name and got the following error   java lang VerifyError   class  be post ehr wfm application serviceorganization report DisplayReportServlet  method  getMD signature   IILjava util Collection Lj    ava util Collection Ljava util HashMap Ljava util Collection Ljava util Locale Lorg apache struts util MessageResources-        N       N   w-  m   w-  mX    M X   M             at java lang Class getDeclaredConstructors0 Native Method              at java lang Class privateGetDeclaredConstructors Class java 2357             at java lang Class getConstructor0 Class java 2671              at java lang Class newInstance0 Class java 321              at java lang Class newInstance Class java 303    You can see that more of the method signature is shown   The actual method signature is    private PgasePdfTable getMonthData int month  int year  Collection dayTypes                            Collection calendarDays                            HashMap bcSpecialDays                            Collection activityPeriods                            Locale locale  MessageResources resources  throws   Exception     I already tried looking at it with javap and that gives the method signature as it should be   When my other colleagues check out the code  compile it and deploy it  they have the same problem  When the build server picks up the code and deploys it on development or testing environments  HPUX   the same error occurs  Also an automated testing machine running Ubuntu shows the same error during server startup   The rest of the application runs okay  only that one servlet is out of order  Any ideas where to look would be helpful

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java lang VerifyError are the worst   You would get this error if the bytecode size of your method exceeds the 64kb limit  but you would probably have noticed that   Are you 100  sure this class isn t present in the classpath elsewhere in your application  maybe in another jar   Also  from your stacktrace  is the character encoding of the source file  utf-8   Is that correct

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java lang VerifyError means your compiled bytecode is referring to something that Android cannot find  This verifyError Issues me only with kitkat4 4 and lesser version not in above version of that even I ran the same build in both Devices  when I used jackson json parser of older version it shows java lang verifyerror  compile  com fasterxml jackson core jackson-databind 2 2    compile  com fasterxml jackson core jackson-core 2 2    compile  com fasterxml jackson core jackson-annotations 2 2      Then I have changed the Dependancy to the latest version 2 2 to 2 7 without the core library  then it works  which means the Methods and other contents of core is migrated to the latest version of Databind2 7  This fix my Issues   compile  com fasterxml jackson core jackson-annotations 2 7 0-rc3  compile  com fasterxml jackson core jackson-databind 2 7 0-rc3

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please remove any unusable jar file and try to run  and its work for me i added a jcommons jar file and also another jcommons 1 0 14 jar file so remove jcommons and its working for me

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VerifyError means that the class file contains bytecode that is syntactically correct but violates some semantic restriction e g  a jump target that crosses method boundaries   Basically  a VerifyError can only occur when there is a compiler bug  or when the class file gets corrupted in some other way  e g  through faulty RAM or a failing HD    Try compiling with a different JDK version and on a different machine

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One thing you might try is using -Xverify all which will verify bytecode on load and sometimes gives helpful error messages if the bytecode is invalid

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Another reason for this error can be the combination of AspectJ  lt   1 6 11 with JRE   6   See Eclipse Bug 353467 and Kieker ticket 307 for details   This is especially true when everything works fine on JRE 6 and moving to JRE7 breaks things

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java lang VerifyError can be the result when you have compiled against a different library than you are using at runtime   For example  this happened to me when trying to run a program that was compiled against Xerces 1  but Xerces 2 was found on the classpath   The required classes  in org apache   namespace  were found at runtime  so ClassNotFoundException was not the result   There had been changes to the classes and methods  so that the method signatures found at runtime did not match what was there at compile-time   Normally  the compiler will flag problems where method signatures do not match   The JVM will verify the bytecode again when the class is loaded  and throws VerifyError when the bytecode is trying to do something that should not be allowed -- e g  calling a method that returns String and then stores that return value in a field that holds a List

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This page may give you some hints - http   www zanthan com itymbi archives 000337 html  There may be a subtle bug in the body of that method that javac fails to spot  Difficult to diagnose unless you post the whole method here    You could start by declaring as many variables as possible as final    that would have caught the bug mentioned on the zanthan site  and is often a good practice anyways

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In my case my Android project depends on another Java project compiled for Java 7  java lang VerifyError disappeared after I changed Compiler Compliance Level of that Java project to 6 0  Later I found out that this is a Dalvik issue  https   groups google com forum  fromgroups  topic android-developers sKsMTZ42pwE

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Though the reason mentioned by Kevin is correct  but I would definitely check below before moving to something else    Check the cglibs in my classpath   Check the hibernate versions in my classpath    Chances are good that having multiple or conflicting version of any of the above could cause unexpected issues like the one in question

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If you are migrating to java7 or using java7 then generally this error can be seen  I faced above errors and struggled a lot to find out the root cause  I would suggest to try adding  -XX -UseSplitVerifier  JVM argument while running your application

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In my case I had to remove this block   compileOptions       sourceCompatibility JavaVersion VERSION 1 7     targetCompatibility JavaVersion VERSION 1 7     It was showing error near Fragment showDialog   method call

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Minimal example that generates the error  One simple possibility is to use Jasmin  or to manually edit the bytecode with a binary file editor   Lets create void method without a return instruction  generated by the return  statement in Java   which the JVMS says is illegal   In Jasmin we could write    class public Main  super java lang Object   method public static main  Ljava lang String  V    aload 0   Just so that we won t get another verify error for empty code   end method   We then do javac Main j and javap -v Main says that we have compiled   public static void main java lang String       descriptor    Ljava lang String  V   flags  ACC PUBLIC  ACC STATIC   Code      stack 1  locals 1  args size 1        0  aload 0   so really there is no return instruction   Now if we try to run java Main we get   Error  A JNI error has occurred  please check your installation and try again Exception in thread  main  java lang VerifyError   class  NoReturn  method  main signature    Ljava lang String  V  Falling off the end of the code         at java lang Class getDeclaredMethods0 Native Method          at java lang Class privateGetDeclaredMethods Class java 2701          at java lang Class privateGetMethodRecursive Class java 3048          at java lang Class getMethod0 Class java 3018          at java lang Class getMethod Class java 1784          at sun launcher LauncherHelper validateMainClass LauncherHelper java 544          at sun launcher LauncherHelper checkAndLoadMain LauncherHelper java 526    This error can never happen in Java normally  since the Java compiler adds an implicit return to void methods for us  This is why we don t need to add a return to our main methods  You can check this with javap   JVMS  VerifyError happens when you try to run certain types of illegal class file as specified by JVMS 7 chapter 4 5  The JVMS says that when Java loads a file  it must run a series of checks to see that the class file is OK before running it   Such errors cannot be generated on a single compile and run cycle of Java code  because JVMS 7 4 10 says      Even though a compiler for the Java programming language must only produce class files that satisfy all the static and structural constraints            So to see a minimal failure example  we will need to generate the source code without javac

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This can happen on Android when you re trying to load a library that was compiled against Oracle s JDK   Here is the problem for Ning Async HTTP client

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CGLIB  lt  2 2 with JRE   6 could trigger similar errors  see  Should I upgrade to CGLIB 3 0   and some commentary at Spring SPR-9669   This is especially true when everything works fine on JRE 6 and simply switching to JRE7 breaks things

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In my case  I was getting verify error with below stack trace  jasperreports-server-cp-6 4 0-bin buildomatic build xml 61  The following error occurred while executing this line  TIB js-jrs-cp 6 4 0 bin jasperreports-server-cp-6 4 0-bin buildomatic bin setup xml 320  java lang VerifyError   class  org apache commons codec binary Base64OutputStream  method   lt init gt  signature   Ljava io OutputStream ZI B V  Incompatible argument to function     at com jaspersoft jasperserver crypto KeystoreManager createKeystore KeystoreManager java 257      at com jaspersoft jasperserver crypto KeystoreManager init KeystoreManager java 224      at com jaspersoft buildomatic crypto KeystoreTask execute KeystoreTask java 64      at org apache tools ant UnknownElement execute UnknownElement java 292      at sun reflect GeneratedMethodAccessor4 invoke Unknown Source      at sun reflect DelegatingMethodAccessorImpl invoke DelegatingMethodAccessorImpl java 43      at java lang reflect Method invoke Method java 498      at org apache tools ant dispatch DispatchUtils execute DispatchUtils java 106      at org apache tools ant Task perform Task java 348      at org apache tools ant taskdefs Sequential execute Sequential java 68      at org apache tools ant UnknownElement execute UnknownElement java 292      at sun reflect GeneratedMethodAccessor4 invoke Unknown Source      at sun reflect DelegatingMethodAccessorImpl invoke DelegatingMethodAccessorImpl java 43      at java lang reflect Method invoke Method java 498      at org apache tools ant dispatch DispatchUtils execute DispatchUtils java 106      at org apache tools ant Task perform Task java 348      at org apache tools ant Target execute Target java 435      at org apache tools ant helper ProjectHelper2 parse ProjectHelper2 java 169      at org apache tools ant taskdefs ImportTask importResource ImportTask java 222      at org apache tools ant taskdefs ImportTask execute ImportTask java 163      at org apache tools ant UnknownElement execute UnknownElement java 292      at sun reflect NativeMethodAccessorImpl invoke0 Native Method      at sun reflect NativeMethodAccessorImpl invoke NativeMethodAccessorImpl java 62      at sun reflect DelegatingMethodAccessorImpl invoke DelegatingMethodAccessorImpl java 43      at java lang reflect Method invoke Method java 498      at org apache tools ant dispatch DispatchUtils execute DispatchUtils java 106      at org apache tools ant Task perform Task java 348      at org apache tools ant Target execute Target java 435      at org apache tools ant helper ProjectHelper2 parse ProjectHelper2 java 180      at org apache tools ant ProjectHelper configureProject ProjectHelper java 93      at org apache tools ant Main runBuild Main java 826      at org apache tools ant Main startAnt Main java 235      at org apache tools ant launch Launcher run Launcher java 280      at org apache tools ant launch Launcher main Launcher java 109    I got it resolved by removing classpath entry for commons-codec-1 3 jar  there was a mismatch in version of this jar with the one comes with Jasper

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As Kevin Panko said  it s mostly because of library change  So in some cases a  clean  of the project  directory  followed by a build does the trick

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Check for multiple versions of the same jar file on your classpath     For example  I had opennlp-tools-1 3 0 jar and opennlp-tools-1 5 3 jar on my classpath and got this error   The solution was to delete opennlp-tools-1 3 0 jar

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It could also happen when you have a lot of module imports with maven  There will be two or more classes having exactly the same name   same qualified name   This error is resulting from difference of interpretation between compile time and runtime

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After updating Gradle in Android Studio 3 6 1 crashes happened on API 19 in release build   There was a Glide library error  Solution is to rewrite proguard-rules txt   Also downgrading Gradle works  classpath  com android tools build gradle 3 5 3    but it is an outdated solution  don t use it

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I have fixed a similar java lang VerifyError issue by replacing          catch  MagickException e    with          catch  Exception e    where MagickException was defined in a library project  on which my project has a dependency    After that I have got a java lang NoClassDefFoundError about a class from the same library  fixed according to https   stackoverflow com a 9898820 755804

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I fixed this error on Android by making the project I was importing a library  as described here http   developer android com tools projects projects-eclipse html SettingUpLibraryProject  Previously  I was just referencing the project  not making it a library  and I was getting this strange VerifyError   Hope it helps someone

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Well in my case  my project A had a dependency on another  say X A was using some of the classes defined in X   So when I added X as a reference project in the build path of A   I got this error  However when I removed X as the referenced project and included X s jar as one of the libraries  the problem was solved

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I was getting this problem due to pack200 mangling a class file  A bit of searching turned this java bug up  Basically  setting --effort 4 caused the problem to go away   Using java 1 5 0 17  though it cropped up in every single variant of java 1 5 I tried it in

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write on file    Wildfly-home  modules system layers base org picketbox main    into dependencies next   lt module name  sun jdk   gt

[java] Causes of getting a java.lang.VerifyError

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