2018-03-27 22:14:04 UTC - Igor Zubchenok: Hello
I have a real challenge to build my final jar with Pulsar client dependency.
Build succeeds, but when I run my jar file I have 'Error: Could not find or
load main class'.
All works if I remove the Pulsar dependency.
Could anyone help me with some guide how to understand the problem and find a
solution??? Please!
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2018-03-27 22:25:59 UTC - Piotr: I assume you have dissected the jar? Unrared
it and checked its contents?
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2018-03-27 22:47:04 UTC - Igor Zubchenok: I checked it has all contents and my
main and other classes as well as pulsar classes.
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2018-03-27 22:47:52 UTC - Matteo Merli: are you using shade plugin to get a fat
jar?
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2018-03-27 22:48:21 UTC - Matteo Merli: can you compare the list of classes
included in both cases?
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2018-03-27 22:50:28 UTC - Igor Zubchenok: I have fat jar with such gradle config
```
jar {
manifest {
attributes "Main-Class": "com.zubchenok.EntryPoint"
}
from {
configurations.compile.collect { it.isDirectory() ? it : zipTree(it) }
}
}
```
Going to compare set of files now...
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2018-03-27 23:05:07 UTC - Igor Zubchenok: Ok, I have file comparison. When I
add the dependency, new files added to jar.
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2018-03-27 23:05:22 UTC - Igor Zubchenok: Nothing missed.
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2018-03-27 23:11:51 UTC - Piotr: checked the manifest?
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2018-03-27 23:13:30 UTC - Igor Zubchenok: of cause, it's exactly the same
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2018-03-27 23:32:45 UTC - Igor Zubchenok: Seems the issue with some transitive
dependency...
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2018-03-27 23:49:17 UTC - Igor Zubchenok: I found pulsar-client has the
following dependencies:
```\--- org.apache.pulsar:pulsar-client:1.22.0-incubating
+--- org.slf4j:slf4j-api:1.7.25
+--- org.bouncycastle:bcpkix-jdk15on:1.55
| \--- org.bouncycastle:bcprov-jdk15on:1.55
\--- org.bouncycastle:bcprov-jdk15on:1.55
```
I don't have org.bouncycastle dependency anywhere, but I use
cassandra-driver-core and it has a dependency to org.slf4j:slf4j-api:1.7.25
The same version anyway.
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2018-03-27 23:50:27 UTC - Matteo Merli: Yes, it’s already a “fat” jar, all the
usually problematic dependencies are already shaded
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2018-03-27 23:50:53 UTC - Matteo Merli: you can exclude bouncycastle if you’re
not going to enable encryption
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2018-03-27 23:51:04 UTC - Igor Zubchenok: I'll try
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2018-03-27 23:54:55 UTC - Igor Zubchenok: like a magic :star-struck:
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2018-03-28 00:01:01 UTC - Igor Zubchenok: Thank you very much for suggestion. I
still don't know the real reason why it fails anyway.
I have one more question:
My jar grows from from ~30mb to 51mb with pulsar-client and to 65mb with
pulsar-client and pulsar-client-admin-original.
Why is it so big dependency?
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2018-03-28 00:01:38 UTC - Matteo Merli: they’re both shading all the
dependencies
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2018-03-28 00:02:41 UTC - Matteo Merli: probably many classes could be stripped
by using the “minimizeJar” option, though it’s tricky to get a real sense of
whether it’s really working or if it will be missing some used classes
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2018-03-28 00:24:14 UTC - Igor Zubchenok: I really appreciate your help!
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2018-03-28 00:57:33 UTC - Matteo Merli: No prob, you're welcome
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