Some builds are failing, but they never finish. Execution is stopped after Findbugs analysis. I have to run manually, again, and then the build finishes in the right way.

Here is a console extract:
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[INFO]
[INFO] — maven-surefire-plugin:2.10:test (default-test) @ connectorservice —
[INFO] Surefire report directory: /var/lib/jenkins/jobs/servicio-transmisor/workspace/target/surefire-reports

-------------------------------------------------------
T E S T S
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Running cl.eftbanca.coretransaccional.services.ConsultationServiceTest
<response><code>-5</code><description>LLega mensaje no valido al servicio transmisor</description></response>
<transmission><type>webservice</type><properties><endpoint>http://localhost:8081/jersey/consultation</endpoint><contentType>text/xml;charset=UTF-8</contentType></properties><data><mensaje><encabezado><fecha_hora>2013-01-01T00:00:00+06:00</fecha_hora><id_trx_consulta>324AB3C4D40123HH</id_trx_consulta></encabezado><consulta><id_cliente>A000B045E677123-R</id_cliente><id_servicio></id_servicio></consulta></mensaje></data></transmission>
<response><code>-6</code><description>Problemas con algun parametro que requeria el transmisor</description></response>
<response><code>-7</code><description>Error inesperado</description></response>
Tests run: 4, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.189 sec

Results :

Tests run: 4, Failures: 0, Errors: 0, Skipped: 0

[JENKINS] Recording test results
[INFO]
[INFO] — cobertura-maven-plugin:2.6:cobertura (default-cli) @ connectorservice —
[INFO] Cobertura 2.0.3 - GNU GPL License (NO WARRANTY) - See COPYRIGHT file
Report time: 880ms

[ERROR] May 7, 2014 10:47:15 AM net.sourceforge.cobertura.coveragedata.CoverageDataFileHandler loadCoverageData
INFO: Cobertura: Loaded information on 15 classes.

[INFO] Cobertura Report generation was successful.
[INFO]
[INFO] — findbugs-maven-plugin:2.5.3:findbugs (default-cli) @ connectorservice —
[INFO] Fork Value is true
[java] Warnings generated: 29
[INFO] Done FindBugs Analysis....