Jack's error.

[29% 17593/59326] Ensure Jack server is installed and started
FAILED:/bin/bash-c "(Prebuilts/sdk/tools/jack-admin install-server Prebuilts/sdk/tools/jack-launcher.jar prebuilts /sdk/tools/jack-server-4.8.alpha.jar 2>&1 | | (Exit 0)) && (jack_server_vm_arguments=\ "-dfile.encoding=utf-8-xx:+tieredcompilation\" prebuilts/sdk/tools/ Jack-admin Start-server 2>&1 | | Exit 0) && (prebuilts/sdk/tools/jack-admin Update server Prebuilts/sdk/tools/jack-server-4.8.alpha.jar 4.8. ALPHA 2>&1 | | Exit 0) && (prebuilts/sdk/tools/jack-admin update Jack Prebuilts/sdk/tools/jacks/jack-2.28.release.jar 2.28. RELEASE | | Exit 47; Prebuilts/sdk/tools/jack-admin update Jack Prebuilts/sdk/tools/jacks/jack-3.36.candidate.jar 3.36.CANDIDATE | | Exit 47; Prebuilts/sdk/tools/jack-admin update Jack Prebuilts/sdk/tools/jacks/jack-4.7.beta.jar 4.7.BETA | | Exit 47) "
Writing Client Settings In/home/nikos/.jack-settings
Installing Jack Server in "/home/nikos/.jack-server"
Communication error with Jack Server ($), try ' jack-diagnose ' or see Jack server log
Failed to contact Jack Server:problem Reading/home/nikos/.jack-server/client.pem. Try ' Jack-diagnose '
Failed to contact Jack Server:problem Reading/home/nikos/.jack-server/client.pem. Try ' Jack-diagnose '
[29% 17593/59326] Notice File:packages/apps/certinstaller/notice--out/target/product/h6168/obj/notice_files/src//system/app/ Certinstaller/certinstaller.apk.txt
[29% 17593/59326] Aidl:android-support-v4 <= Frameworks/support/v4/java/android/support/v4/os/iresultreceiver.aidl
[29% 17593/59326] Aidl:android-support-v4 <= Frameworks/support/v4/java/android/support/v4/media/session/imediasession.aidl
[29% 17593/59326] Protoc:out/target/common/obj/java_libraries/sap-api-java-static_intermediates/src/proto/proto.stamp <= Hardware/ril/librilutils/proto/sap-api.proto
[29% 17593/59326] Target strip:fuelgauged_static (out/target/product/h6168/obj_arm/executables/fuelgauged_static_ intermediates/fuelgauged_static)
[29% 17593/59326] host java:cts-tradefed (out/host/common/obj/java_libraries/cts-tradefed_intermediates/classes)
[29% 17593/59326] Compiling SDK Stubs:out/target/common/obj/java_libraries/android_stubs_current_intermediates/classes.jar
Note:some input files use or override a deprecated API.
Note:recompile with-xlint:deprecation for details.
Note:some input files Use unchecked or unsafe operations.
Note:recompile with-xlint:unchecked for details.
Ninja:build Stopped:subcommand failed.
Make: * * * [ninja_wrapper] Error 1

[0;31m#### make failed to build some targets (48:53 (MM:SS)) ####[00m

Modification Method:

Modify the port numbers in both $home/.jack-settings and $home/.jack-server/config.properties (for example, to 8086/8087) to support simultaneous multi-user compilation.

Now you can use this method to solve the problem, and then see if Google will be optimized for Jack. If you have any questions, please shoot bricks!

Jack's error.