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apache 对象存储 httpclient
http://help.aliyun.com/apsara/agile/v_3_5_0_20210228/oss/ase-developer-guide/faq-1.html
细心的硬币
1 年前

使用OSS Java SDK时，报类似如下错误，说明您的工程里可能有包冲突。 

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/http/ssl/TrustStrategy
    at com.aliyun.oss.OSSClient.<init>(OSSClient.java:268)
    at com.aliyun.oss.OSSClient.<init>(OSSClient.java:193)
    at com.aliyun.oss.demo.HelloOSS.main(HelloOSS.java:77)
Caused by: java.lang.ClassNotFoundException: org.apache.http.ssl.TrustStrategy
    at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
    ... 3 more
				
Exception in thread "main" java.lang.NoSuchFieldError: INSTANCE
 at org.apache.http.impl.io.DefaultHttpRequestWriterFactory.<init>(DefaultHttpRequestWriterFactory.java:52)
 at org.apache.http.impl.io.DefaultHttpRequestWriterFactory.<init>(DefaultHttpRequestWriterFactory.java:56)
 at org.apache.http.impl.io.DefaultHttpRequestWriterFactory.<clinit>(DefaultHttpRequestWriterFactory.java:46)
 at org.apache.http.impl.conn.ManagedHttpClientConnectionFactory.<init>(ManagedHttpClientConnectionFactory.java:82)
 at org.apache.http.impl.conn.ManagedHttpClientConnectionFactory.<init>(ManagedHttpClientConnectionFactory.java:95)
 at org.apache.http.impl.conn.ManagedHttpClientConnectionFactory.<init>(ManagedHttpClientConnectionFactory.java:104)
 at org.apache.http.impl.conn.ManagedHttpClientConnectionFactory.<clinit>(ManagedHttpClientConnectionFactory.java:62)
 at org.apache.http.impl.conn.PoolingHttpClientConnectionManager$InternalConnectionFactory.<init>(PoolingHttpClientConnectionManager.java:572)
 at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.<init>(PoolingHttpClientConnectionManager.java:174)
 at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.<init>(PoolingHttpClientConnectionManager.java:158)
 at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.<init>(PoolingHttpClientConnectionManager.java:149)
 at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.<init>(PoolingHttpClientConnectionManager.java:125)
 at com.aliyun.oss.common.comm.DefaultServiceClient.createHttpClientConnectionManager(DefaultServiceClient.java:237)
 at com.aliyun.oss.common.comm.DefaultServiceClient.<init>(DefaultServiceClient.java:78)
 at com.aliyun.oss.OSSClient.<init>(OSSClient.java:268)
 at com.aliyun.oss.OSSClient.<init>(OSSClient.java:193)
 at OSSManagerImpl.upload(OSSManagerImpl.java:42)
 at OSSManagerImpl.main(OSSManagerImpl.java:63)
			
问题原因：OSS Java SDK使用了Apache httpclient 4.4.1，而您的工程使用了与Apache httpclient 4.4.1冲突的Apache httpclient或commons-httpclient jar包。要查看工程使用的jar包及版本，请在您的工程目录下执行mvn dependency:tree。如下图所示，您的工程里使用了Apache httpclient 4.3：

			
解决方案：包冲突有以下两种解决方法。 
					
  • 使用统一版本。如果您的工程使用与Apache httpclient 4.4.1冲突的版本，请您使用4.4.1版本，并在pom.xml删除其它版本的Apache httpclient依赖。如果您的工程使用了commons-httpclient，也可能存在冲突，请删除commons-httpclient。
    • 
					
  • 解除依赖冲突。如果您的工程依赖多个第三方包，而第三方包又依赖不同版本的Apache httpclient，您的工程里会有依赖冲突，请使用exclusion解除。详细请参见Maven Guides。
    • 
			
    OSS Java SDK依赖以下版本的包，冲突解决办法与httpclient类似。
    
			
    使用OSS Java SDK时，报类似如下错误：
    
			
    Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/http/auth/Credentials
        at com.aliyun.oss.OSSClient.<init>(OSSClient.java:268)
        at com.aliyun.oss.OSSClient.<init>(OSSClient.java:193)
        at com.aliyun.oss.demo.HelloOSS.main(HelloOSS.java:76)
Caused by: java.lang.ClassNotFoundException: org.apache.http.auth.Credentials
        at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
        ... 3 more
    
			
    Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/http/protocol/HttpContext
        at com.aliyun.oss.OSSClient.<init>(OSSClient.java:268)
        at com.aliyun.oss.OSSClient.<init>(OSSClient.java:193)
        at com.aliyun.oss.demo.HelloOSS.main(HelloOSS.java:76)
Caused by: java.lang.ClassNotFoundException: org.apache.http.protocol.HttpContext
        at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
        ... 3 more
    
			
    Exception in thread "main" java.lang.NoClassDefFoundError: org/jdom/input/SAXBuilder
        at com.aliyun.oss.internal.ResponseParsers.getXmlRootElement(ResponseParsers.java:645)
        at … …
        at com.aliyun.oss.OSSClient.doesBucketExist(OSSClient.java:471)
        at com.aliyun.oss.OSSClient.doesBucketExist(OSSClient.java:465)
        at com.aliyun.oss.demo.HelloOSS.main(HelloOSS.java:82)
Caused by: java.lang.ClassNotFoundException: org.jdom.input.SAXBuilder
        at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
        ... 11 more
    
			
    问题原因：您的工程中可能缺少编译或运行OSS Java SDK所必需的包，OSS Java SDK依赖下列包：
    
				
  • aliyun-sdk-oss-2.2.1.jar
    • 
				
  • hamcrest-core-1.1.jar
    • 
				
  • jdom-1.1.jar
    • 
				
  • commons-codec-1.9.jar
    • 
				
  • httpclient-4.4.1.jar
    • 
				
  • commons-logging-1.2.jar
    • 
				
  • httpcore-4.4.1.jar
    • 
				
  • log4j-1.2.15.jar
    • 
			
    其中，log4j-1.2.15.jar是可选的，需要日志功能的时加入该包，其他包都是必不可少的。
    
			
    解决方案：您的工程中在加入OSS Java SDK依赖的包，加入方法如下：
    
				
  • 如果您的工程在Eclipse中，请参考安装中的安装方式二：在Eclipse项目中导入工程依赖的包。
    • 
				
  • 如果您的工程是Ant。请把OSS Java SDK依赖的包，放入工程lib目录；
    • 
				
  • 如果您直接使用javac/java，请使用-classpath/-cp指定OSS Java SDK依赖的包路径，或把OSS Java SDK依赖的包放入classpath路经下。
    • 
			
    运行OSS Java SDK程序抛出如下异常：
    
			
    com.aliyun.oss.ClientException: SocketException
    at com.aliyun.oss.common.utils.ExceptionFactory.createNetworkException(ExceptionFactory.java:71)
    at com.aliyun.oss.common.comm.DefaultServiceClient.sendRequestCore(DefaultServiceClient.java:116)
    at com.aliyun.oss.common.comm.ServiceClient.sendRequestImpl(ServiceClient.java:121)
    at com.aliyun.oss.common.comm.ServiceClient.sendRequest(ServiceClient.java:67)
    at com.aliyun.oss.internal.OSSOperation.send(OSSOperation.java:92)
    at com.aliyun.oss.internal.OSSOperation.doOperation(OSSOperation.java:140)
    at com.aliyun.oss.internal.OSSOperation.doOperation(OSSOperation.java:111)
    at com.aliyun.oss.internal.OSSBucketOperation.getBucketInfo(OSSBucketOperation.java:1152)
    at com.aliyun.oss.OSSClient.getBucketInfo(OSSClient.java:1220)
    at com.aliyun.oss.OSSClient.getBucketInfo(OSSClient.java:1214)
    at com.aliyun.oss.demo.HelloOSS.main(HelloOSS.java:94)
Caused by: org.apache.http.conn.HttpHostConnectException: Connect to oss-test.oss-cn-hangzhou-internal.aliyuncs.com:80 [oss-test.oss-cn-hangzhou-internal.aliyuncs.com/10.84.135.99] failed: Connection timed out: connect
    at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:151)
    at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:353)
    at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:380)
    at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:236)
    at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:184)
    at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110)
    at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:184)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82)
    at com.aliyun.oss.common.comm.DefaultServiceClient.sendRequestCore(DefaultServiceClient.java:113)
    ... 9 more
    
			
    问题原因：Endpoint错误或者网络不通。
    
			
    解决方案：解决网络问题后重试。
    
			
    org.apache.http.NoHttpResponseException: The target server failed to respond
    
			
    运行OSS Java SDK程序抛出如下异常：
    
			
    问题原因：使用过期的连接会导致上述错误。该错误仅在Java SDK 2.1.2前的版本出现。
    
			
    解决方案：请升级OSS Java SDK到2.1.2及以后版本。
    
			
    调用OSS Java SDK不响应
    
			
    调用OSS Java SDK不响应，通过jstack -l <pid>查看堆栈，问题出现在如下位置：
    
			
    "main" prio=6 tid=0x000000000291e000 nid=0xc40 waiting on condition [0x0000000002dae000]
java.lang.Thread.State: WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for  <0x00000007d85697f8> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
    at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2043)
    at org.apache.http.pool.PoolEntryFuture.await(PoolEntryFuture.java:138)
    at org.apache.http.pool.AbstractConnPool.getPoolEntryBlocking(AbstractConnPool.java:306)
    at org.apache.http.pool.AbstractConnPool.access$000(AbstractConnPool.java:64)
    at org.apache.http.pool.AbstractConnPool$2.getPoolEntry(AbstractConnPool.java:192)
    at org.apache.http.pool.AbstractConnPool$2.getPoolEntry(AbstractConnPool.java:185)
    at org.apache.http.pool.PoolEntryFuture.get(PoolEntryFuture.java:107)
    at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.leaseConnection(PoolingHttpClientConnectionManager.java:276)
    at org.apache.http.impl.conn.PoolingHttpClientConnectionManager$1.get(PoolingHttpClientConnectionManager.java:263)
    at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:190)
    at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:184)
    at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110)
    at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:184)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82)
    at com.aliyun.oss.common.comm.DefaultServiceClient.sendRequestCore(DefaultServiceClient.java:113)
    at com.aliyun.oss.common.comm.ServiceClient.sendRequestImpl(ServiceClient.java:123)
    at com.aliyun.oss.common.comm.ServiceClient.sendRequest(ServiceClient.java:68)
    at com.aliyun.oss.internal.OSSOperation.send(OSSOperation.java:94)
    at com.aliyun.oss.internal.OSSOperation.doOperation(OSSOperation.java:146)
    at com.aliyun.oss.internal.OSSOperation.doOperation(OSSOperation.java:113)
    at com.aliyun.oss.internal.OSSObjectOperation.getObject(OSSObjectOperation.java:229)
    at com.aliyun.oss.OSSClient.getObject(OSSClient.java:629)
    at com.aliyun.oss.OSSClient.getObject(OSSClient.java:617)
    at samples.HelloOSS.main(HelloOSS.java:49)
    
			
    问题原因：连接池中连接泄漏，可能是使用OSSClient.getObject，但是没有关闭。
    
			
    解决方案：请检查您的程序，确保没有连接泄漏。关闭方法如下： 
				
    // 读取文件
OSSObject ossObject = ossClient.getObject(bucketName, objectName);
// OSS操作
// 关闭ossObject
ossObject.close();               
    
			
    您在使用OSSClient.getObject时，报类似如下错误：
    
			
    Exception in thread "main" org.apache.http.ConnectionClosedException: Premature end of Content-Length delimited message body (expected: 11990526; received: 202880
    at org.apache.http.impl.io.ContentLengthInputStream.read(ContentLengthInputStream.java:180)
    at org.apache.http.impl.io.ContentLengthInputStream.read(ContentLengthInputStream.java:200)
    at org.apache.http.impl.io.ContentLengthInputStream.close(ContentLengthInputStream.java:103)
    at org.apache.http.impl.execchain.ResponseEntityProxy.streamClosed(ResponseEntityProxy.java:128)
    at org.apache.http.conn.EofSensorInputStream.checkClose(EofSensorInputStream.java:228)
    at org.apache.http.conn.EofSensorInputStream.close(EofSensorInputStream.java:174)
    at java.io.FilterInputStream.close(FilterInputStream.java:181)
    at java.io.FilterInputStream.close(FilterInputStream.java:181)
    at com.aliyun.oss.event.ProgressInputStream.close(ProgressInputStream.java:147)
    at java.io.FilterInputStream.close(FilterInputStream.java:181)
    at samples.HelloOSS.main(HelloOSS.java:39)
    
			
    问题原因：两次读取数据间隔时间超过1分钟。OSS会关闭超过1分钟没有发送/接收数据的连接。如果您的应用模式是，读取部分数据—处理数据—读取数据—处理数据，且处理数据的时间不固定。
    
			
    解决方案：如果您每次读取部分数据进行处理，且处理数据的时间不固定，建议指定范围读取，避免数据读取时连接关闭。
    
			
    调调用OSS Java SDK的程序，运行一段时间（根据业务量，几小时到几天不等）后内存泄露。
    
			
    问题原因：请使用内存分析工具，分析内存使用情况。推荐使用Eclipse Memory Analyzer(MAT)，使用方法请参见使用MAT进行堆转储文件分析。
    
			
    如果分析结果类似下图所示（PoolingHttpClientConnectionManager占96%的内存），原因是程序中可能多次执行new OSSClient，但是没有调用ossClient.shutdown，造成内存泄漏。
    
			
    解决方案：new OSSClient一定要和ossClient.shutdown成对使用。
    
			
    调用OSSClient.shutdown抛异常InterruptedException
    
			
    调用OSSClient.shutdown抛如下异常：
    
			
    java.lang.InterruptedException: sleep interrupted
        at java.lang.Thread.sleep(Native Method)
        at com.aliyun.oss.common.comm.IdleConnectionReaper.run(IdleConnectionReaper:76)
    
			
    问题原因：OSSClient后台线程IdleConnectionReaper，定时关闭闲置连接。IdleConnectionReaper线程在sleep时，调用shutdown，就会抛出上面的异常。
    
			
    解决方案： 
					
  • OSS Java SDK 2.3.0已经修复该问题，请升级您的SDK版本。
    • 
					
  • OSS Java SDK 2.3.0之前的版本，请使用如下代码，忽略该异常： 
						
    try {
serviceClient.shutdown();
} catch(Exception e) {
    •  
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