When I build is posting the message below in the jenkins log, but some times don´t show the error:

WARNING: jira rest client get issue error. cause: RestClientException{statusCode=Optional.absent(), errorCollections=[]}
java.util.concurrent.ExecutionException: RestClientException{statusCode=Optional.absent(), errorCollections=[]}
at com.google.common.util.concurrent.AbstractFuture$Sync.getValue(AbstractFuture.java:289)
at com.google.common.util.concurrent.AbstractFuture$Sync.get(AbstractFuture.java:262)

....

Caused by: RestClientException{statusCode=Optional.absent(), errorCollections=[]}
at com.atlassian.jira.rest.client.internal.async.AbstractAsynchronousRestClient$3.apply(AbstractAsynchronousRestClient.java:188)
at com.atlassian.jira.rest.client.internal.async.AbstractAsynchronousRestClient$3.apply(AbstractAsynchronousRestClient.java:182)
at com.atlassian.httpclient.api.ResponsePromiseMapFunction.apply(ResponsePromiseMapFunction.java:62)
at com.atlassian.httpclient.api.ResponsePromiseMapFunction.apply(ResponsePromiseMapFunction.java:12)
at com.atlassian.util.concurrent.Promises$Of$3.apply(Promises.java:285)
at com.atlassian.util.concurrent.Promises$2.onSuccess(Promises.java:162)
at com.google.common.util.concurrent.Futures$6.run(Futures.java:975)
at com.google.common.util.concurrent.MoreExecutors$SameThreadExecutorService.execute(MoreExecutors.java:253)
at com.google.common.util.concurrent.ExecutionList$RunnableExecutorPair.execute(ExecutionList.java:149)
at com.google.common.util.concurrent.ExecutionList.execute(ExecutionList.java:134)
at com.google.common.util.concurrent.AbstractFuture.set(AbstractFuture.java:170)
at com.google.common.util.concurrent.SettableFuture.set(SettableFuture.java:53)
at com.atlassian.util.concurrent.Promises$Of$3.apply(Promises.java:285)
at com.atlassian.util.concurrent.Promises$2.onSuccess(Promises.java:162)
at com.google.common.util.concurrent.Futures$6.run(Futures.java:975)
at com.google.common.util.concurrent.MoreExecutors$SameThreadExecutorService.execute(MoreExecutors.java:253)
at com.google.common.util.concurrent.ExecutionList$RunnableExecutorPair.execute(ExecutionList.java:149)
at com.google.common.util.concurrent.ExecutionList.execute(ExecutionList.java:134)
at com.google.common.util.concurrent.AbstractFuture.set(AbstractFuture.java:170)
at com.google.common.util.concurrent.SettableFuture.set(SettableFuture.java:53)
at com.atlassian.httpclient.apache.httpcomponents.SettableFuturePromiseHttpPromiseAsyncClient$1$1.run(SettableFuturePromiseHttpPromiseAsyncClient.java:46)
at com.atlassian.httpclient.apache.httpcomponents.SettableFuturePromiseHttpPromiseAsyncClient$ThreadLocalDelegateRunnable$1.run(SettableFuturePromiseHttpPromiseAsyncClient.java:197)
at com.atlassian.httpclient.apache.httpcomponents.SettableFuturePromiseHttpPromiseAsyncClient.runInContext(SettableFuturePromiseHttpPromiseAsyncClient.java:90)
at com.atlassian.httpclient.apache.httpcomponents.SettableFuturePromiseHttpPromiseAsyncClient$ThreadLocalDelegateRunnable.run(SettableFuturePromiseHttpPromiseAsyncClient.java:192)
... 3 more
Caused by: org.codehaus.jettison.json.JSONException: JSONObject["type"] not found.
at org.codehaus.jettison.json.JSONObject.get(JSONObject.java:360)
at org.codehaus.jettison.json.JSONObject.getString(JSONObject.java:487)
at com.atlassian.jira.rest.client.internal.json.IssueJsonParser.parseSchema(IssueJsonParser.java:344)
at com.atlassian.jira.rest.client.internal.json.IssueJsonParser.parseFields(IssueJsonParser.java:309)
at com.atlassian.jira.rest.client.internal.json.IssueJsonParser.parse(IssueJsonParser.java:223)
at com.atlassian.jira.rest.client.internal.json.IssueJsonParser.parse(IssueJsonParser.java:88)
at com.atlassian.jira.rest.client.internal.async.AbstractAsynchronousRestClient$1.handle(AbstractAsynchronousRestClient.java:145)
at com.atlassian.jira.rest.client.internal.async.AbstractAsynchronousRestClient$3.apply(AbstractAsynchronousRestClient.java:186)
... 26 more