try {
jobIdStrings = client.getChildren(folder);
} catch (KeeperException.NoNodeException e) {
return null;
} catch (KeeperException e) {
throw new HeliosRuntimeException("List tasks for host failed: " + host, e);
}
final ImmutableList.Builder<JobId> jobIds = ImmutableList.builder();
for (String jobIdString : jobIdStrings) {
jobIds.add(JobId.fromString(jobIdString));
}