pipeline hangs after executing sh step command

node('builder') {
    stage('Build/Fetch') {
	git ...
	sh '''curl -O http://file/skt/sktrc
              curl -O http://file/skt/default.config'''
    }
    stage('Build') {
	sh '''./skt.py -vv --state --rc sktrc merge
	      ./skt.py -vv --state --rc sktrc build
	      ./skt.py -vv --state --rc sktrc publish'''
	sktrc = readFile 'sktrc'
	sh '''./skt.py -vv --state --rc sktrc cleanup'''
    }
}

node('runner') {
    stage('Test/Fetch') {
	git 'http://git/skt.git'
	sh '''curl -O http://filejob.xml'''
	writeFile file: 'sktrc', text: "${sktrc}"
    }
    stage('Test') {
	sh '''PATH="/home/worker/bin:$PATH" ./skt.py -vv --state --rc sktrc run --wait
	      ./skt.py -vv --state --rc sktrc cleanup'''
    }
}