Euler 2.0 compile error

init:

ivy-download:

ivy-taskdef:

ivy-init:

ivy-retrieve:
[ivy:retrieve] :: Apache Ivy 2.4.0 - 20141213170938 :: http://ant.apache.org/ivy/ ::
[ivy:retrieve] :: loading settings :: file = /home/alan/euler/third_party/zookeeper/ivysettings.xml
[ivy:retrieve] :: resolving dependencies :: org.apache.zookeeper#zookeeper;3.6.0-SNAPSHOT
[ivy:retrieve] confs: [default]
[ivy:retrieve] found jline#jline;2.11 in maven2
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.apache.ivy.util.url.IvyAuthenticator (file:/home/alan/euler/third_party/zookeeper/zookeeper-server/src/main/resources/lib/ivy-2.4.0.jar) to field java.net.Authenticator.theAuthenticator
WARNING: Please consider reporting this to the maintainers of org.apache.ivy.util.url.IvyAuthenticator
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[ivy:retrieve] found org.eclipse.jetty#jetty-server;9.4.10.v20180503 in maven2
[ivy:retrieve] found javax.servlet#javax.servlet-api;3.1.0 in maven2
[ivy:retrieve] found org.eclipse.jetty#jetty-http;9.4.10.v20180503 in maven2
[ivy:retrieve] found org.eclipse.jetty#jetty-util;9.4.10.v20180503 in maven2
[ivy:retrieve] found org.eclipse.jetty#jetty-io;9.4.10.v20180503 in maven2
[ivy:retrieve] found org.eclipse.jetty#jetty-servlet;9.4.10.v20180503 in maven2
[ivy:retrieve] found org.eclipse.jetty#jetty-security;9.4.10.v20180503 in maven2

build zookeeper is slow, it always stop in here

Reproduce the build using the reported output and inspect third_party/zookeeper/ivysettings.xml and the ivy-retrieve step, where dependency resolution stops after the Apache Ivy and Jetty messages. Determine why the Zookeeper build does not progress, then verify that the build completes successfully.

Written by the indexing model from the issue text.