java.lang.ClassNotFoundException: jdk.internal.misc.Unsafe

[Devendra Vishwakarma]

I suddenly started seeing java.lang.ClassNotFoundException: jdk.internal.misc.Unsafe when connecting to cassandra cluster. 

Logs- 

018-02-21 14:15:41 DEBUG Cluster:1416 - Starting new cluster with contact points [localhost/127.0.0.1:9042, localhost/0:0:0:0:0:0:0:1:9042]

2018-02-21 14:15:41 DEBUG InternalLoggerFactory:71 - Using SLF4J as the default logging framework

2018-02-21 14:15:41 DEBUG PlatformDependent0:76 - -Dio.netty.noUnsafe: false

2018-02-21 14:15:41 DEBUG PlatformDependent0:71 - sun.misc.Unsafe.theUnsafe: available

2018-02-21 14:15:41 DEBUG PlatformDependent0:71 - sun.misc.Unsafe.copyMemory: available

2018-02-21 14:15:41 DEBUG PlatformDependent0:71 - java.nio.Buffer.address: available

2018-02-21 14:15:41 DEBUG PlatformDependent0:71 - direct buffer constructor: available

2018-02-21 14:15:41 DEBUG PlatformDependent0:76 - java.nio.Bits.unaligned: available, true

2018-02-21 14:15:41 DEBUG PlatformDependent0:91 - jdk.internal.misc.Unsafe.allocateUninitializedArray(int): unavailable

java.lang.ClassNotFoundException: jdk.internal.misc.Unsafe

at java.net.URLClassLoader.findClass(URLClassLoader.java:381)

at java.lang.ClassLoader.loadClass(ClassLoader.java:424)

at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)

at java.lang.ClassLoader.loadClass(ClassLoader.java:357)

at io.netty.util.internal.PlatformDependent0$6.run(PlatformDependent0.java:290)

at java.security.AccessController.doPrivileged(Native Method)

at io.netty.util.internal.PlatformDependent0.<clinit>(PlatformDependent0.java:283)

at io.netty.util.internal.PlatformDependent.getSystemClassLoader(PlatformDependent.java:641)

at io.netty.util.internal.PlatformDependent.isAndroid0(PlatformDependent.java:665)

at io.netty.util.internal.PlatformDependent.<clinit>(PlatformDependent.java:65)

at io.netty.util.Signal.<clinit>(Signal.java:31)

at io.netty.util.concurrent.DefaultPromise.<clinit>(DefaultPromise.java:43)

at io.netty.util.concurrent.GlobalEventExecutor.<init>(GlobalEventExecutor.java:44)

at io.netty.util.concurrent.GlobalEventExecutor.<clinit>(GlobalEventExecutor.java:41)

at com.datastax.driver.core.Connection$Factory.<init>(Connection.java:752)

at com.datastax.driver.core.Cluster$Manager.init(Cluster.java:1446)

at com.datastax.driver.core.Cluster.init(Cluster.java:159)

at com.datastax.driver.core.Cluster.connectAsync(Cluster.java:330)

at com.datastax.driver.core.Cluster.connectAsync(Cluster.java:305)

at com.datastax.driver.core.Cluster.connect(Cluster.java:247)

2018-02-21 14:15:41 DEBUG PlatformDependent0:76 - java.nio.DirectByteBuffer.<init>(long, int): available

2018-02-21 14:15:41 DEBUG PlatformDependent:71 - Platform: Windows

2018-02-21 14:15:41 DEBUG PlatformDependent:76 - Java version: 8

2018-02-21 14:15:41 DEBUG PlatformDependent:76 - sun.misc.Unsafe: available

2018-02-21 14:15:41 DEBUG PlatformDependent:76 - -Dio.netty.tmpdir: C:\Users\Dell\AppData\Local\Temp (java.io.tmpdir)

2018-02-21 14:15:41 DEBUG PlatformDependent:76 - -Dio.netty.bitMode: 64 (sun.arch.data.model)

2018-02-21 14:15:41 DEBUG PlatformDependent:76 - -Dio.netty.noPreferDirect: false

2018-02-21 14:15:41 DEBUG PlatformDependent:76 - -Dio.netty.maxDirectMemory: 3797417984 bytes

2018-02-21 14:15:41 DEBUG PlatformDependent:76 - -Dio.netty.uninitializedArrayAllocationThreshold: -1

2018-02-21 14:15:41 DEBUG CleanerJava6:71 - java.nio.ByteBuffer.cleaner(): available

2018-02-21 14:15:41 DEBUG SystemProperties:48 - com.datastax.driver.FORCE_NIO is undefined, using default value false

2018-02-21 14:15:41 INFO  NettyUtil:83 - Did not find Netty's native epoll transport in the classpath, defaulting to NIO.

2018-02-21 14:15:41 DEBUG MultithreadEventLoopGroup:76 - -Dio.netty.eventLoopThreads: 8

2018-02-21 14:15:41 DEBUG NioEventLoop:76 - -Dio.netty.noKeySetOptimization: false

2018-02-21 14:15:41 DEBUG NioEventLoop:76 - -Dio.netty.selectorAutoRebuildThreshold: 512

2018-02-21 14:15:41 DEBUG PlatformDependent:71 - org.jctools-core.MpscChunkedArrayQueue: available

2018-02-21 14:15:42 TRACE NioEventLoop:46 - instrumented a special java.util.Set into: sun.nio.ch.WindowsSelectorImpl@2c35e847

2018-02-21 14:15:42 TRACE NioEventLoop:46 - instrumented a special java.util.Set into: sun.nio.ch.WindowsSelectorImpl@74751b3

2018-02-21 14:15:42 TRACE NioEventLoop:46 - instrumented a special java.util.Set into: sun.nio.ch.WindowsSelectorImpl@741a8937

2018-02-21 14:15:42 TRACE NioEventLoop:46 - instrumented a special java.util.Set into: sun.nio.ch.WindowsSelectorImpl@306e95ec

2018-02-21 14:15:42 TRACE NioEventLoop:46 - instrumented a special java.util.Set into: sun.nio.ch.WindowsSelectorImpl@52af26ee

2018-02-21 14:15:42 TRACE NioEventLoop:46 - instrumented a special java.util.Set into: sun.nio.ch.WindowsSelectorImpl@6fd83fc1

2018-02-21 14:15:42 TRACE NioEventLoop:46 - instrumented a special java.util.Set into: sun.nio.ch.WindowsSelectorImpl@4f2b503c

2018-02-21 14:15:42 TRACE NioEventLoop:46 - instrumented a special java.util.Set into: sun.nio.ch.WindowsSelectorImpl@bae7dc0

2018-02-21 14:15:42 DEBUG ResourceLeakDetector:81 - -Dio.netty.leakDetection.level: simple

2018-02-21 14:15:42 DEBUG ResourceLeakDetector:81 - -Dio.netty.leakDetection.maxRecords: 4

2018-02-21 14:15:42 DEBUG ResourceLeakDetectorFactory:76 - Loaded default ResourceLeakDetector: io.netty.util.ResourceLeakDetector@550dbc7a

2018-02-21 14:15:42 DEBUG SystemProperties:48 - com.datastax.driver.EXTENDED_PEER_CHECK is undefined, using default value true

2018-02-21 14:15:42 TRACE STATES:138 - canReconnectNow=true

2018-02-21 14:15:42 DEBUG STATES:88 - [localhost/0:0:0:0:0:0:0:1:9042] preparing to open 1 new connections, total = 1

2018-02-21 14:15:42 DEBUG SystemProperties:48 - com.datastax.driver.DISABLE_COALESCING is undefined, using default value false

2018-02-21 14:15:42 DEBUG PooledByteBufAllocator:76 - -Dio.netty.allocator.numHeapArenas: 8

2018-02-21 14:15:42 DEBUG PooledByteBufAllocator:76 - -Dio.netty.allocator.numDirectArenas: 8

2018-02-21 14:15:42 DEBUG PooledByteBufAllocator:76 - -Dio.netty.allocator.pageSize: 8192

2018-02-21 14:15:42 DEBUG PooledByteBufAllocator:76 - -Dio.netty.allocator.maxOrder: 11

2018-02-21 14:15:42 DEBUG PooledByteBufAllocator:76 - -Dio.netty.allocator.chunkSize: 16777216

2018-02-21 14:15:42 DEBUG PooledByteBufAllocator:76 - -Dio.netty.allocator.tinyCacheSize: 512

2018-02-21 14:15:42 DEBUG PooledByteBufAllocator:76 - -Dio.netty.allocator.smallCacheSize: 256

2018-02-21 14:15:42 DEBUG PooledByteBufAllocator:76 - -Dio.netty.allocator.normalCacheSize: 64

2018-02-21 14:15:42 DEBUG PooledByteBufAllocator:76 - -Dio.netty.allocator.maxCachedBufferCapacity: 32768

2018-02-21 14:15:42 DEBUG PooledByteBufAllocator:76 - -Dio.netty.allocator.cacheTrimInterval: 8192

2018-02-21 14:15:42 DEBUG PooledByteBufAllocator:76 - -Dio.netty.allocator.useCacheForAllThreads: true

2018-02-21 14:15:42 DEBUG ByteBufUtil:76 - -Dio.netty.allocator.type: unpooled

2018-02-21 14:15:42 DEBUG ByteBufUtil:76 - -Dio.netty.threadLocalDirectBufferSize: 65536

2018-02-21 14:15:42 DEBUG ByteBufUtil:76 - -Dio.netty.maxThreadLocalCharBufferSize: 16384

2018-02-21 14:15:43 DEBUG Connection:164 - Connection[localhost/0:0:0:0:0:0:0:1:9042-1, inFlight=0, closed=false] Error connecting to localhost/0:0:0:0:0:0:0:1:9042 (Connection refused: no further information: localhost/0:0:0:0:0:0:0:1:9042)

2018-02-21 14:15:43 TRACE STATES:429 - Defuncting Connection[localhost/0:0:0:0:0:0:0:1:9042-1, inFlight=0, closed=false]

com.datastax.driver.core.exceptions.TransportException: [localhost/0:0:0:0:0:0:0:1:9042] Cannot connect

at com.datastax.driver.core.Connection$1.operationComplete(Connection.java:165)

at com.datastax.driver.core.Connection$1.operationComplete(Connection.java:148)

at io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:507)

at io.netty.util.concurrent.DefaultPromise.notifyListeners0(DefaultPromise.java:500)

at io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:479)

at io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:420)

at io.netty.util.concurrent.DefaultPromise.tryFailure(DefaultPromise.java:122)

at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.fulfillConnectPromise(AbstractNioChannel.java:278)

at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:294)

at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:633)

at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:580)

at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:497)

at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:459)

at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:131)

at io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:138)

at java.lang.Thread.run(Thread.java:745)

Caused by: io.netty.channel.AbstractChannel$AnnotatedConnectException: Connection refused: no further information: localhost/0:0:0:0:0:0:0:1:9042

at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)

at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)

at io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect(NioSocketChannel.java:258)

at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:291)

... 7 more

Caused by: java.net.ConnectException: Connection refused: no further information

... 11 more

2018-02-21 14:15:43 DEBUG STATES:125 - [localhost/0:0:0:0:0:0:0:1:9042] preventing new connections for the next 1000 ms

2018-02-21 14:15:43 DEBUG STATES:108 - [localhost/0:0:0:0:0:0:0:1:9042] Connection[localhost/0:0:0:0:0:0:0:1:9042-1, inFlight=0, closed=false] failed, remaining = 0

2018-02-21 14:15:43 DEBUG Connection:690 - Connection[localhost/0:0:0:0:0:0:0:1:9042-1, inFlight=0, closed=true] closing connection

2018-02-21 14:15:43 DEBUG ControlConnection:243 - [Control connection] error on localhost/0:0:0:0:0:0:0:1:9042 connection, trying next host

Please help.

[Gábor Auth]

Hi,

On Wed, Feb 21, 2018 at 9:50 AM Devendra Vishwakarma <vvvv...@gmail.com> wrote:

I suddenly started seeing java.lang.ClassNotFoundException: jdk.internal.misc.Unsafe when connecting to cassandra cluster. 

What is the version of the Netty on the classpath?

https://github.com/netty/netty/issues/6855

Bye,

Gábor Auth

--

Bye,

Auth Gábor

[Devendra Vishwakarma]

Hi,

I am seeing these 5 jars of netty in my project class path and the version is 4.0.47

netty-handler

netty-buffer

netty-common

netty-transport

netty-codec

Thanks,

Devendra

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[Gábor Auth]

Hi,

On Thu, Feb 22, 2018 at 6:02 PM Devendra Vishwakarma <vvvv...@gmail.com> wrote:

I am seeing these 5 jars of netty in my project class path and the version is 4.0.47

Upgrade to 4.1.12.Final.

Bye,

Gábor Auth

--

Bye,

Auth Gábor

[Devendra Vishwakarma]

Thanks Gabor, Adding the below given dependency solved my issue-

<dependency>

<groupId>io.netty</groupId>

<artifactId>netty-all</artifactId>

<version>4.1.12.Final</version>

</dependency>

Devendra

--

Bye,

Auth Gábor

--

[Jacques-Henri Berthemet]

Hi,

 

Is it safe to use a different Netty version than the one Datastax driver was built/tested with? I thought that was the point of the shaded driver.

 

--

Jacques-Henri Berthemet

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Bye,

Auth Gábor

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[Andy Tolbert]

Good point Jacques-Henri.  We've done a little bit of testing of Netty 4.1.x with the java driver and it works, but as indicated, most of our testing and development is done against 4.0, so it'd be more advisable to use that.

In this case it looks like this was just something fixed in netty 4.1 and not 4.0.  This is not an actual problem, but more of a noisy DEBUG-level log annoyance though right?

Thanks,

Andy

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Auth Gábor

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[Jacques-Henri Berthemet]

When our QA saw the issue I just silenced the logger rather than use the non-shaded driver, I didn’t see any issue beside the log being gone. We’re actually using Netty 3.5, 4.1 and 4.0 at the same time, 4.0 is used by the shaded driver. If it’s safe to use DS driver with 4.1 I’d be happy to switch to non-shaded driver.

 

--

Jacques-Henri Berthemet

 

From: java-dri...@lists.datastax.com [mailto:java-dri...@lists.datastax.com] On Behalf Of Andy Tolbert
Sent: Friday, February 23, 2018 4:42 PM
To: DataStax Java Driver for Apache Cassandra User Mailing List <java-dri...@lists.datastax.com>
Subject: Re: java.lang.ClassNotFoundException: jdk.internal.misc.Unsafe

 

Good point Jacques-Henri.  We've done a little bit of testing of Netty 4.1.x with the java driver and it works, but as indicated, most of our testing and development is done against 4.0, so it'd be more advisable to use that.

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Auth Gábor

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[Gábor Auth]

Hi,

On Fri, Feb 23, 2018 at 10:28 AM Jacques-Henri Berthemet <jacques-hen...@genesys.com> wrote:

Is it safe to use a different Netty version than the one Datastax driver was built/tested with?

It is not safe... but sometimes there is no other way, for example, the Wildfly 11.0.0 contains version 4.1.x of netty... :/

Bye,

Gábor Auth

--

Bye,

Auth Gábor