“NoSuchMethodErrors” due to multiple versions of commons-codec:commons-codec:jar

[Bing-ok]

Issue description

Hi, there are multiple versions of commons-codec:commons-codec in book-master. As shown in the following dependency tree, according to Maven "nearest wins" strategy, only commons-codec:commons-codec:1.6 can be loaded, commons-codec:commons-codec:1.2, commons-codec:commons-codec:1.5 and commons-codec:commons-codec:1.4 will be shadowed.

However, several methods defined in shadowed version commons-codec:commons-codec:1.2, commons-codec:commons-codec:1.5 and commons-codec:commons-codec:1.4 are referenced by client project via org.apache.mahout:mahout-core:0.6, org.apache.mahout:mahout-integration:0.6, org.apache.solr:solr-solrj:3.6.0, org.apache.tika:tika-parsers:0.10 and org.carrot2:carrot2-core:3.6.0 but missing in the actually loaded version commons-codec:commons-codec:1.6.

For instance, the following missing method(defined in commons-codec:commons-codec:1.2, commons-codec:commons-codec:1.5 and commons-codec:commons-codec:1.4) are actually referenced by book-master, which will introduce a runtime error(i.e., "NoSuchMethodError") into book-master.

1. <org.apache.commons.codec.binary.Base64: java.lang.String encodeToString(byte[])> is invoked by book-master via the following path:

path--
<com.tamingtext.util.SplitInput: void splitFile(org.apache.hadoop.fs.Path)> com.tamingtext:taming-text:0.1-SNAPSHOT;
<org.apache.hadoop.fs.FileSystem: org.apache.hadoop.fs.FSDataInputStream open(org.apache.hadoop.fs.Path)> org.apache.hadoop:hadoop-core:0.20.204.0;
<org.apache.hadoop.hdfs.HftpFileSystem: org.apache.hadoop.fs.FSDataInputStream open(org.apache.hadoop.fs.Path,int)> org.apache.hadoop:hadoop-core:0.20.204.0;
<org.apache.hadoop.hdfs.HftpFileSystem: java.net.HttpURLConnection openConnection(java.lang.String,java.lang.String)> org.apache.hadoop:hadoop-core:0.20.204.0;
<org.apache.hadoop.hdfs.HftpFileSystem: java.lang.String updateQuery(java.lang.String)> org.apache.hadoop:hadoop-core:0.20.204.0;
<org.apache.hadoop.security.token.Token: java.lang.String encodeToUrlString()> org.apache.hadoop:hadoop-core:0.20.204.0;
<org.apache.hadoop.security.token.Token: java.lang.String encodeWritable(org.apache.hadoop.io.Writable)> org.apache.hadoop:hadoop-core:0.20.204.0;
<org.apache.commons.codec.binary.Base64: java.lang.String encodeToString(byte[])>

Suggested fixing solutions:

1. Change direct dependency commons-codec:commons-codec from 1.6 to 1.4. Because version 1.4 includes the above missing methods and is compatible with other versions of commons-codec:commons-codec in the project.
2. Use configuration to unify the version of library commons-codec:commons-codec to be 1.4 in the pom file.

Please let me know which solution do you prefer? I can submit a PR to fix it.

Thank you very much for your attention.
Best regards,

Dependency tree----

[INFO] |  |  \- (commons-codec:commons-codec:jar:1.2:compile - omitted for conflict with 1.6)
[INFO] |  |  \- (commons-codec:commons-codec:jar:1.6:compile - omitted for duplicate)
[INFO] |  +- commons-codec:commons-codec:jar:1.6:compile
[INFO] |  +- (commons-codec:commons-codec:jar:1.4:compile - omitted for conflict with 1.6)
[INFO] |  |  \- (commons-codec:commons-codec:jar:1.5:compile - omitted for conflict with 1.6)
[INFO] |  |  +- (commons-codec:commons-codec:jar:1.4:compile - omitted for conflict with 1.6)
[INFO] |  |  +- (commons-codec:commons-codec:jar:1.2:compile - omitted for conflict with 1.6)
[INFO] |  +- (commons-codec:commons-codec:jar:1.4:compile - omitted for conflict with 1.6)
[INFO] |  |  \- (commons-codec:commons-codec:jar:1.4:compile - omitted for conflict with 1.6)