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https://issues.apache.org/jira/browse/JCLOUDS-1542?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17146545#comment-17146545
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ASF subversion and git services commented on JCLOUDS-1542:
----------------------------------------------------------
Commit 238c97507816606a0aeca2fafd7a3196bfb7f1dc in jclouds's branch
refs/heads/master from Jean-Noël Rouvignac
[ https://gitbox.apache.org/repos/asf?p=jclouds.git;h=238c975 ]
JCLOUDS-1542 Java 11 warns of illegal reflective access (#76)
With Java 11, an illegal reflective access is output for the google cloud
storage blobstore.
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.jclouds.reflect.Reflection2$1
(file:/.../jclouds-core.jar) to constructor
java.lang.String(char[],int,int,java.lang.Void)
WARNING: Please consider reporting this to the maintainers of
org.jclouds.reflect.Reflection2$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal
reflective access operations
WARNING: All illegal access operations will be denied in a future release
Indeed, JClouds calls `setAccessible(true)` on the package protected constructor
`java.lang.String(char[],int,int,java.lang.Void)`.
Investigating the code, it turns out it is looking for constructors annotated
with any of:
* java.beans.ConstructorProperties
* org.jclouds.json.SerializedNames
* com.google.inject.Inject
But `String` being defined in `java.base` module, it is impossible
that it will be annotated with any of these annotation.
This commit is complementary to JClouds commit
db4e4af931ef19f582b85f02efb93e50f1c5d01c .
Reflection2.java:
Do not call `setAccessible(true)` on core java constructors and methods.
For reference, here is the stacktrace of this illegal access warning:
java.lang.String.<init>(String.java:3208)
java.lang.String.<init>(String.java:251)
java.util.StringJoiner.compactElts(StringJoiner.java:250)
java.util.StringJoiner.toString(StringJoiner.java:173)
jdk.internal.module.IllegalAccessLogger.loudWarning(IllegalAccessLogger.java:339)
jdk.internal.module.IllegalAccessLogger.log(IllegalAccessLogger.java:288)
jdk.internal.module.IllegalAccessLogger.log(IllegalAccessLogger.java:261)
jdk.internal.module.IllegalAccessLogger.logIfOpenedForIllegalAccess(IllegalAccessLogger.java:226)
java.lang.reflect.AccessibleObject.logIfOpenedForIllegalAccess(AccessibleObject.java:366)
java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:325)
java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:280)
java.lang.reflect.Constructor.checkCanSetAccessible(Constructor.java:189)
java.lang.reflect.Constructor.setAccessible(Constructor.java:182)
org.jclouds.reflect.Reflection2$1.load(Reflection2$1.java:157)
org.jclouds.reflect.Reflection2$1.load(Reflection2$1.java:153)
com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache$LoadingValueReference.java:3529)
com.google.common.cache.LocalCache$Segment.loadSync(LocalCache$Segment.java:2278)
com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache$Segment.java:2155)
com.google.common.cache.LocalCache$Segment.get(LocalCache$Segment.java:2045)
com.google.common.cache.LocalCache.get(LocalCache.java:3953)
com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:3976)
com.google.common.cache.LocalCache$LocalLoadingCache.get(LocalCache$LocalLoadingCache.java:4960)
org.jclouds.reflect.Reflection2.get(Reflection2.java:346)
org.jclouds.reflect.Reflection2.constructors(Reflection2.java:100)
org.jclouds.json.internal.NamingStrategies$AnnotationConstructorNamingStrategy.getDeserializer(NamingStrategies$AnnotationConstructorNamingStrategy.java:271)
org.jclouds.json.internal.DeserializationConstructorAndReflectiveTypeAdapterFactory.create(DeserializationConstructorAndReflectiveTypeAdapterFactory.java:125)
com.google.gson.Gson.getAdapter(Gson.java:458)
org.jclouds.json.gson.internal.bind.ReflectiveTypeAdapterFactory.createBoundField(ReflectiveTypeAdapterFactory.java:117)
org.jclouds.json.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:166)
org.jclouds.json.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:102)
com.google.gson.Gson.getAdapter(Gson.java:458)
com.google.gson.Gson.toJson(Gson.java:696)
com.google.gson.Gson.toJson(Gson.java:683)
com.google.gson.Gson.toJson(Gson.java:638)
com.google.gson.Gson.toJson(Gson.java:618)
org.jclouds.json.internal.GsonWrapper.toJson(GsonWrapper.java:65)
org.jclouds.oauth.v2.functions.ClaimsToAssertion.apply(ClaimsToAssertion.java:59)
org.jclouds.oauth.v2.functions.ClaimsToAssertion.apply(ClaimsToAssertion.java:43)
org.jclouds.rest.internal.RestAnnotationProcessor.getParamValue(RestAnnotationProcessor.java:829)
org.jclouds.rest.internal.RestAnnotationProcessor.getFormParamKeyValues(RestAnnotationProcessor.java:847)
org.jclouds.rest.internal.RestAnnotationProcessor.addFormParams(RestAnnotationProcessor.java:435)
org.jclouds.rest.internal.RestAnnotationProcessor.apply(RestAnnotationProcessor.java:258)
org.jclouds.rest.internal.RestAnnotationProcessor.apply(RestAnnotationProcessor.java:137)
org.jclouds.rest.internal.InvokeHttpMethod.toCommand(InvokeHttpMethod.java:189)
org.jclouds.rest.internal.InvokeHttpMethod.invoke(InvokeHttpMethod.java:85)
org.jclouds.rest.internal.InvokeHttpMethod.apply(InvokeHttpMethod.java:74)
org.jclouds.rest.internal.InvokeHttpMethod.apply(InvokeHttpMethod.java:45)
org.jclouds.rest.internal.DelegatesToInvocationFunction.handle(DelegatesToInvocationFunction.java:156)
org.jclouds.rest.internal.DelegatesToInvocationFunction.invoke(DelegatesToInvocationFunction.java:123)
com.sun.proxy.$Proxy49.authorize(Unknown Source)
org.jclouds.oauth.v2.filters.JWTBearerTokenFlow$AuthorizeToken.load(JWTBearerTokenFlow$AuthorizeToken.java:84)
org.jclouds.oauth.v2.filters.JWTBearerTokenFlow$AuthorizeToken.load(JWTBearerTokenFlow$AuthorizeToken.java:68)
com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache$LoadingValueReference.java:3529)
com.google.common.cache.LocalCache$Segment.loadSync(LocalCache$Segment.java:2278)
com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache$Segment.java:2155)
com.google.common.cache.LocalCache$Segment.get(LocalCache$Segment.java:2045)
com.google.common.cache.LocalCache.get(LocalCache.java:3953)
com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:3976)
com.google.common.cache.LocalCache$LocalLoadingCache.get(LocalCache$LocalLoadingCache.java:4960)
com.google.common.cache.LocalCache$LocalLoadingCache.getUnchecked(LocalCache$LocalLoadingCache.java:4966)
org.jclouds.oauth.v2.filters.JWTBearerTokenFlow.filter(JWTBearerTokenFlow.java:99)
org.jclouds.http.internal.BaseHttpCommandExecutorService.invoke(BaseHttpCommandExecutorService.java:90)
org.jclouds.rest.internal.InvokeHttpMethod.invoke(InvokeHttpMethod.java:91)
org.jclouds.rest.internal.InvokeHttpMethod.apply(InvokeHttpMethod.java:74)
org.jclouds.rest.internal.InvokeHttpMethod.apply(InvokeHttpMethod.java:45)
org.jclouds.reflect.FunctionalReflection$FunctionalInvocationHandler.handleInvocation(FunctionalReflection.java:117)
com.google.common.reflect.AbstractInvocationHandler.invoke(AbstractInvocationHandler.java:86)
com.sun.proxy.$Proxy54.simpleUpload(Unknown Source)
org.jclouds.googlecloudstorage.blobstore.GoogleCloudStorageBlobStore.uploadMultipartPart(GoogleCloudStorageBlobStore.java:422)
org.jclouds.blobstore.internal.BaseBlobStore$BlobUploader.call(BaseBlobStore.java:415)
org.jclouds.blobstore.internal.BaseBlobStore$BlobUploader.call(BaseBlobStore.java:402)
com.google.common.util.concurrent.TrustedListenableFutureTask$TrustedFutureInterruptibleTask.runInterruptibly(TrustedListenableFutureTask.java:125)
com.google.common.util.concurrent.InterruptibleTask.run(InterruptibleTask.java:69)
com.google.common.util.concurrent.TrustedListenableFutureTask.run(TrustedListenableFutureTask.java:78)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor$Worker.java:628)
java.lang.Thread.run(Thread.java:834)
> Java 11 warns of illegal reflective access
> ------------------------------------------
>
> Key: JCLOUDS-1542
> URL: https://issues.apache.org/jira/browse/JCLOUDS-1542
> Project: jclouds
> Issue Type: Improvement
> Components: jclouds-blobstore, jclouds-labs-google
> Affects Versions: 2.2.0
> Reporter: ctranxuan
> Priority: Major
> Time Spent: 1h 40m
> Remaining Estimate: 0h
>
> When using JClouds BlobStore for Google Cloud Storage with Java 11, some
> warning are displayed by the JVM about illegal reflective access:
>
> {quote}WARNING: An illegal reflective access operation has occurred
> WARNING: Illegal reflective access by org.jclouds.reflect.Reflection2$1
> ([file:/.../jclouds-core.jar|file:///.../jclouds-core.jar]) to constructor
> java.lang.String(char[],int,int,java.lang.Void)
> WARNING: Please consider reporting this to the maintainers of
> org.jclouds.reflect.Reflection2$1
> WARNING: Use --illegal-access=warn to enable warnings of further illegal
> reflective access operations
> WARNING: All illegal access operations will be denied in a future release
> {quote}
>
> JClouds works but as stated, these illegal reflective accesses may be denied
> in upper Java versions.
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