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java.lang.IllegalArgumentException: Host name may not be blank at org.apache.http.util.Args.notBlank(Args.java:68) at org.apache.http.HttpHost.<init>(HttpHost.java:81) at org.apache.http.client.utils.URIUtils.extractHost(URIUtils.java:370) at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:132) at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:186) at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:72) at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:214) at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:185) at it.unimi.di.law.bubing.util.FetchData.fetch(FetchData.java:322)