Bruce Karsh created LUCENE-5223:
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             Summary: IndexUpgrader (4.4.0) fails when -verbose is not set
                 Key: LUCENE-5223
                 URL: https://issues.apache.org/jira/browse/LUCENE-5223
             Project: Lucene - Core
          Issue Type: Bug
          Components: core/index
    Affects Versions: 4.4
         Environment: Linux
            Reporter: Bruce Karsh
            Priority: Minor


Here it fails because -verbose is not set:

$ java -cp ./lucene-core-4.4-SNAPSHOT.jar org.apache.lucene.index.IndexUpgrader 
./INDEX
Exception in thread "main" java.lang.IllegalArgumentException: printStream must 
not be null
        at 
org.apache.lucene.index.IndexWriterConfig.setInfoStream(IndexWriterConfig.java:514)
        at org.apache.lucene.index.IndexUpgrader.<init>(IndexUpgrader.java:126)
        at org.apache.lucene.index.IndexUpgrader.main(IndexUpgrader.java:109)

Here it works with -verbose set:

$ java -cp ./lucene-core-4.4-SNAPSHOT.jar org.apache.lucene.index.IndexUpgrader 
-verbose ./INDEX
IFD 0 [Mon Sep 16 18:25:53 PDT 2013; main]: init: current segments file is 
"segments_5"; 
deletionPolicy=org.apache.lucene.index.KeepOnlyLastCommitDeletionPolicy@42698403

...

IW 0 [Mon Sep 16 18:25:53 PDT 2013; main]: at close: _2(4.4):C4

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