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Posted to dev@flink.apache.org by "Jakob Sultan Ericsson (JIRA)" <ji...@apache.org> on 2016/02/09 09:41:18 UTC
[jira] [Created] (FLINK-3373) Using a newer library of Apache
HttpClient than 4.2.6 will get class loading problems
Jakob Sultan Ericsson created FLINK-3373:
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Summary: 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.
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