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Posted to issues@flink.apache.org by "Renkai Ge (JIRA)" <ji...@apache.org> on 2016/09/18 11:11:20 UTC
[jira] [Commented] (FLINK-3373) Using a newer library of Apache
HttpClient than 4.2.6 will get class loading problems
[ https://issues.apache.org/jira/browse/FLINK-3373?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15500799#comment-15500799 ]
Renkai Ge commented on FLINK-3373:
----------------------------------
[~StephanEwen]
This issue seems reproduced in Flink 1.2.0
https://issues.apache.org/jira/browse/FLINK-4587?filter=-2
> 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
> Assignee: Stephan Ewen
> Fix For: 1.0.0
>
>
> 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.
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