xapian-replicate hanging on read on a tcp socket

gistfile1.sh

# ps aux | grep xapian
user     1074  0.1  0.3  26532  2112 ?        S    May16   4:54 xapian-replicate -v -h [...]

# strace -p 1074
Process 1074 attached - interrupt to quit
read(3,

...

# gdb --pid 1074
GNU gdb (GDB) 7.2-ubuntu
Attaching to process 1074
Reading symbols from /usr/local/bin/xapian-replicate...done.
Reading symbols from /usr/local/lib/libxapian.so.22...done.
Loaded symbols for /usr/local/lib/libxapian.so.22
0x00007f04914db710 in read () from /lib/libc.so.6
(gdb) bt
#0  0x00007f04914db710 in read () from /lib/libc.so.6
#1  0x00007f04924b8135 in read (this=0x15472f0, min_len=61, end_time=<value optimized out>) at /usr/include/bits/unistd.h:45
#2  RemoteConnection::read_at_least (this=0x15472f0, min_len=61, end_time=<value optimized out>) at net/remoteconnection.cc:130
#3  0x00007f04924b9b7c in RemoteConnection::get_message_chunk (this=0x3, result=..., at_least=140735456284160, end_time=0) at net/remoteconnection.cc:572
#4  0x00007f0492419c4e in ChertDatabaseReplicator::process_changeset_chunk_blocks (this=<value optimized out>, tablename=<value optimized out>, buf=..., conn=..., end_time=<value optimized out>, changes_fd=-1) at backends/chert/chert_databasereplicator.cc:205
#5  0x00007f049241af60 in ChertDatabaseReplicator::apply_changeset_from_conn (this=<value optimized out>, conn=..., end_time=<value optimized out>, valid=<value optimized out>) at backends/chert/chert_databasereplicator.cc:353
#6  0x00007f04923b6596 in Xapian::DatabaseReplica::Internal::apply_next_changeset (this=0x1543f50, info=0x7fff86e12790, reader_close_time=30) at api/replication.cc:583
#7  0x00007f04923b6d7b in Xapian::DatabaseReplica::apply_next_changeset (this=<value optimized out>, info=0x7fff86e10e00, reader_close_time=4096) at api/replication.cc:280
#8  0x00007f04924c2e43 in ReplicateTcpClient::update_from_master (this=<value optimized out>, path=<value optimized out>, masterdb=..., info=..., reader_close_time=<value optimized out>) at net/replicatetcpclient.cc:60
#9  0x0000000000401a93 in main (argc=<value optimized out>, argv=0x7fff86e12b08) at bin/xapian-replicate.cc:146
(gdb)