Question

我在多个worker中使用Apache HTTP客户端，看起来有某种竞争条件（stacktrace就在最后）。我很困惑，谷歌搜索堆栈跟踪没有提供任何提示（尚未）。在Linux上使用Java 1.7.0-b147 64位。

我在这里做错了吗？
是否有已知的，有效的替代Sun的SSLSocket？

修改也许没用，但是调用代码就像：

public String call() {
    HttpUriRequest request = new HttpGet(aUrl);
    HttpResponse response = httpClient.execute(request);
    StatusLine statusLine = response.getStatusLine();
    return EntityUtils.toString(response.getEntity());
}

其中httpClient与所有可调用对象共享。

堆栈跟踪：

java.lang.NullPointerException
 at sun.security.ssl.SSLSocketImpl.getEnabledCipherSuites(SSLSocketImpl.java:2320)
 at javax.net.ssl.SSLSocket.getSSLParameters(SSLSocket.java:614)
 at sun.security.ssl.SSLSocketImpl.getSSLParameters(SSLSocketImpl.java:2406)
 at sun.security.ssl.SSLAlgorithmConstraints.<init>(SSLAlgorithmConstraints.java:65)
 at sun.security.ssl.Handshaker.init(Handshaker.java:236)
 at sun.security.ssl.Handshaker.<init>(Handshaker.java:191)
 at sun.security.ssl.ClientHandshaker.<init>(ClientHandshaker.java:104)
 at sun.security.ssl.SSLSocketImpl.initHandshaker(SSLSocketImpl.java:1217)
 at sun.security.ssl.SSLSocketImpl.doneConnect(SSLSocketImpl.java:634)
 at sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:608)
 at org.apache.http.conn.ssl.SSLSocketFactory.connectSocket(SSLSocketFactory.java:414)
 at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:180)
 at org.apache.http.impl.conn.ManagedClientConnectionImpl.open(ManagedClientConnectionImpl.java:294)
 at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:643)
 at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:479)
 at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:906)
 at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:805)
 at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:784)

Answer 1

这是一个JDK问题。运行JDK 1.7.0_u4时遇到此问题，升级到JDK 1.7.0_u25后解决了。

SSLSocketImpl.getEnabledCipherSuites中的NPE

1 个答案: