replicasets/maxSyncSourceLagSecs.js failed with "assert.soon failed, msg:sync target not changed to other slave"

[js_test:maxSyncSourceLagSecs] 2015-11-10T16:40:27.997+0000 assert.soon failed, msg:sync target not changed to other slave

[js_test:maxSyncSourceLagSecs] 2015-11-10T16:40:27.997+0000 doassert@src/mongo/shell/assert.js:15:14

[js_test:maxSyncSourceLagSecs] 2015-11-10T16:40:27.998+0000 assert.soon@src/mongo/shell/assert.js:200:13

[js_test:maxSyncSourceLagSecs] 2015-11-10T16:40:27.998+0000 @jstests/replsets/maxSyncSourceLagSecs.js:29:1

[js_test:maxSyncSourceLagSecs] 2015-11-10T16:40:27.998+0000 @jstests/replsets/maxSyncSourceLagSecs.js:2:2

[js_test:maxSyncSourceLagSecs] 2015-11-10T16:40:27.998+0000 

[js_test:maxSyncSourceLagSecs] 2015-11-10T16:40:27.998+0000 2015-11-10T16:40:27.997+0000 E QUERY    [thread1] Error: assert.soon failed, msg:sync target not changed to other slave :

[js_test:maxSyncSourceLagSecs] 2015-11-10T16:40:27.998+0000 doassert@src/mongo/shell/assert.js:15:14

[js_test:maxSyncSourceLagSecs] 2015-11-10T16:40:27.999+0000 assert.soon@src/mongo/shell/assert.js:200:13

[js_test:maxSyncSourceLagSecs] 2015-11-10T16:40:27.999+0000 @jstests/replsets/maxSyncSourceLagSecs.js:29:1

[js_test:maxSyncSourceLagSecs] 2015-11-10T16:40:27.999+0000 @jstests/replsets/maxSyncSourceLagSecs.js:2:2

[js_test:maxSyncSourceLagSecs] 2015-11-10T16:40:27.999+0000 

[js_test:maxSyncSourceLagSecs] 2015-11-10T16:40:27.999+0000 failed to load: jstests/replsets/maxSyncSourceLagSecs.js