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  1. FetchData.fetch() has thrown an IllegalArgumentException
    Unsorted
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    0
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  2. HttpHost.<init>() has thrown an IllegalArgumentException
    HttpCore (base module)
    1
    1
    0

Your stack trace compared to the selected pattern

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java.lang.IllegalArgumentException: Host name may not be blank
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    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:185)
    at it.unimi.di.law.bubing.util.FetchData.fetch(FetchData.java:322)

External results for this pattern (2)