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ASF GitHub Bot commented on FLINK-3373: --------------------------------------- Github user asfgit closed the pull request at: https://github.com/apache/flink/pull/1615 > Using a newer library of Apache HttpClient than 4.2.6 will get class loading > problems > ------------------------------------------------------------------------------------- > > Key: FLINK-3373 > URL: https://issues.apache.org/jira/browse/FLINK-3373 > Project: Flink > Issue Type: Bug > Environment: Latest Flink snapshot 1.0 > Reporter: Jakob Sultan Ericsson > > When I trying to use Apache HTTP client 4.5.1 in my flink job it will crash > with NoClassDefFound. > This has to do that it load some classes from provided httpclient 4.2.5/6 in > core flink. > {noformat} > 17:05:56,193 INFO org.apache.flink.runtime.taskmanager.Task > - DuplicateFilter -> InstallKeyLookup (11/16) switched to FAILED with > exception. > java.lang.NoSuchFieldError: INSTANCE > at > org.apache.http.conn.ssl.SSLConnectionSocketFactory.<clinit>(SSLConnectionSocketFactory.java:144) > at > org.apache.http.impl.conn.PoolingHttpClientConnectionManager.getDefaultRegistry(PoolingHttpClientConnectionManager.java:109) > at > org.apache.http.impl.conn.PoolingHttpClientConnectionManager.<init>(PoolingHttpClientConnectionManager.java:116) > ...<internal classes> > at > org.apache.flink.api.common.functions.util.FunctionUtils.openFunction(FunctionUtils.java:36) > at > org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator.open(AbstractUdfStreamOperator.java:89) > at > org.apache.flink.streaming.runtime.tasks.StreamTask.openAllOperators(StreamTask.java:305) > at > org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:227) > at org.apache.flink.runtime.taskmanager.Task.run(Task.java:566) > at java.lang.Thread.run(Thread.java:745) > {noformat} > SSLConnectionSocketFactory and finds an earlier version of the > AllowAllHostnameVerifier that does have the INSTANCE variable (instance > variable was probably added in 4.3). > {noformat} > jar tvf lib/flink-dist-1.0-SNAPSHOT.jar |grep AllowAllHostnameVerifier > 791 Thu Dec 17 09:55:46 CET 2015 > org/apache/http/conn/ssl/AllowAllHostnameVerifier.class > {noformat} > Solutions would be: > - Fix the classloader so that my custom job does not conflict with internal > flink-core classes... pretty hard > - Remove the dependency somehow. -- This message was sent by Atlassian JIRA (v6.3.4#6332)